Self-locking well lid structure

Abstract

The utility model discloses a kind of self-locking well lid structures, comprising: well pedestal and well lid body, well lid body is hinged on well pedestal, and boss is formed on the inner wall of well pedestal;Self-locking mechanism, self-locking component includes lock bar and the lock hole formed on the inner wall of well pedestal, first installation cavity is formed in well lid body, one end of lock bar is installed in first installation cavity and is connected with unlocking assembly, the other end slidingly extends first installation cavity and is formed with guide slope, lock bar is configured in the stroke of well lid body cover, guide slope can be in contact with the inner wall of well pedestal, so that lock bar is withdrawn into first installation cavity;When well lid body covers, lock bar can extend to outside first installation cavity and be clamped with lock hole, so that well lid body is locked with well pedestal, by the cooperation of lock bar, lock hole and unlocking assembly, the automatic locking and easily unlocking of well lid body are realized, it is easy and efficient to operate, prolong the service life of self-locking mechanism, reduce the maintenance frequency and cost caused by component damage.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, and in particular to a self-locking manhole cover structure. Background Technology

[0002] Manhole covers are primarily used to cover sewers or deep wells on roads, ensuring vehicle safety and preventing serious traffic accidents caused by vehicles accidentally falling into sewers or deep wells. They also prevent pedestrians from accidentally falling in, protecting their personal safety. Most manhole covers currently in use are made of high-quality metal materials. Metal materials have advantages such as high strength and good toughness, enabling manhole covers to have sufficient load-bearing capacity to adapt to different usage scenarios and load requirements.

[0003] However, due to the recyclability of metal materials, metal manhole covers have a high economic value in the market, making them more susceptible to theft compared to manhole covers made of other materials. Lost manhole covers not only pose a significant threat to road safety, endangering vehicles and pedestrians, but also increase the difficulty and cost of municipal maintenance. Therefore, to prevent manhole cover theft, existing manhole covers typically employ a locking mechanism, requiring a special key to open. However, this design presents several problems in practical use. Firstly, the keyhole is often blocked by dirt, stones, and other debris, making it impossible to insert the key when needed, thus affecting normal work progress. Secondly, the key and keyhole opening are constantly exposed to the outdoor environment, making them susceptible to corrosion from rainwater and dust, severely impacting the lifespan of the lock and making it difficult to open the manhole cover. Furthermore, manually locking the manhole cover is required when closing it, which is cumbersome and reduces work efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a self-locking manhole cover structure to solve the problems of existing lock structures being difficult to open, easily damaged, and requiring manual locking when closed, which reduces lock life, is cumbersome to operate, and affects work efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A self-locking manhole cover structure, comprising:

[0007] The manhole base and the manhole cover body are hinged to the manhole base. A boss is formed on the inner wall of the manhole base, and the boss is configured to abut against the manhole cover body when the manhole cover body is closed.

[0008] The self-locking mechanism includes a locking rod and a locking hole formed on the inner wall of the well base. A first mounting cavity is formed inside the well cover body. One end of the locking rod is installed in the first mounting cavity and connected to an unlocking component. The other end slides out of the first mounting cavity and forms a guide slope. The locking rod is configured such that during the stroke of the well cover body closing, the guide slope can abut against the inner wall of the well base, so that the locking rod retracts into the first mounting cavity. When the well cover body is closed, the locking rod can extend out of the first mounting cavity and engage with the locking hole, so that the well cover body and the well base are locked.

[0009] Based on the aforementioned technical means, through the cooperation of the locking rod and the lock hole, and combined with the guide slope on the locking rod, the locking rod can automatically retract and extend when it contacts the inner wall of the well seat, thereby engaging with the lock hole. This achieves automatic locking of the well cover body when it is closed, eliminating the need for manual locking by personnel. The operation is simple and efficient. Furthermore, the first installation cavity provides a closed installation environment for the locking rod, preventing external factors such as rainwater and dust from corroding the locking rod, extending the service life of the self-locking mechanism, and reducing the maintenance frequency and cost caused by component damage. In addition, by driving the locking rod back into the first installation cavity through the unlocking component, the locking rod is disengaged from the lock hole, allowing the well cover body to be easily opened. The structure is simple, the operation is easy, and the work efficiency is improved. It effectively avoids the problems of easy blockage and corrosion of keyholes and the need to carry keys, which are common with traditional well covers that require a key to open. This improves the convenience and reliability of well cover use and reduces maintenance costs.

[0010] Furthermore, the self-locking mechanism also includes a first spring, which is sleeved on the locking rod, with one end fixed to the locking rod and the other end fixed to the inner wall of the first mounting cavity. The first spring is configured to provide a spring force to the locking rod, which is retracted into the first mounting cavity, to extend out of the first mounting cavity.

[0011] According to the above-mentioned technical means, the first spring provides elastic force to the locking rod, so that the locking rod, which is retracted into the first mounting cavity, tends to extend out of the first mounting cavity. Thus, when there is no external force obstructing the locking rod, it can automatically extend out of the first mounting cavity. This not only ensures the stability of the automatic engagement between the locking rod and the locking hole when the manhole cover is closed, and ensures the reliability of the self-locking function between the manhole cover and the manhole base, but also enables the locking rod to quickly reset after the manhole cover is unlocked, preparing for the next self-locking when closing. This improves the overall performance and ease of use of the manhole cover's self-locking and unlocking.

[0012] Furthermore, the unlocking assembly includes a rotating shaft, a handle, a gear, and a rack. One end of the rotating shaft is rotatably installed in the first mounting cavity, and the other end extends out of the first mounting cavity and is connected to the handle. The gear is coaxially fixed on the rotating shaft. The rack is slidably installed in the first mounting cavity along the axial direction of the locking rod and meshes with the gear. One end of the locking rod is connected to the rack.

[0013] Based on the aforementioned technical means, the unlocking function between the manhole cover body and the manhole base is achieved through the cooperation of the rotating shaft, handle, gear, and rack. Specifically, rotating the handle drives the rotating shaft and gear to rotate, thereby driving the rack to move along its length direction, so as to drive the locking rod back into the first installation cavity, so that the locking rod disengages from the locking hole, thereby unlocking the manhole cover body from the manhole base. At the same time, the first spring stores the force for the locking rod to reset. The structure and transmission are precise, stable and reliable. Operators only need to simply rotate the handle to easily complete the unlocking, simplifying the manhole cover opening process, making it less susceptible to external environmental factors, improving the convenience and reliability of manhole cover unlocking, and reducing maintenance difficulty and cost.

[0014] Furthermore, the unlocking component also includes a slider, the rack is mounted on the slider, and a groove is formed on the inner wall of the first mounting cavity along the length direction of the rack, and the slider is slidably mounted in the groove.

[0015] Based on the above technical means, the cooperation between the slider and the groove provides precise guidance and stable support for the movement of the rack, avoiding problems such as rack deviation and wobbling during transmission, ensuring the smoothness and accuracy of gear and rack meshing transmission, thereby ensuring the smoothness and reliability of unlocking operation, and improving overall stability and service life.

[0016] Furthermore, it also includes a push rod and a drive assembly. A second mounting cavity is formed within the boss. The push rod is located within the second mounting cavity, with one end connected to the drive assembly and the other end configured to slide out of the second mounting cavity. The drive assembly is configured to drive the push rod to slide along its axial direction, causing the push rod to retract into the second mounting cavity to close the manhole cover body; or to cause the push rod to extend out of the second mounting cavity and abut against the lower end face of the manhole cover body to open the manhole cover body.

[0017] Based on the aforementioned technical means, a push rod is set on the boss. Under the drive of the drive component, the push rod slides axially in the second mounting cavity, so that when it extends, it abuts against the lower end face of the manhole cover body to lift the manhole cover body and help the manhole cover body open smoothly. This avoids the problem of the manhole cover body being stuck with the manhole seat due to excessive pressure or small fitting gaps, which would make it difficult to open. When the manhole cover body is closed, it retracts into the second mounting cavity to ensure that the manhole cover body is completely closed. The structure is simple, and the opening and closing operation of the manhole cover body is more flexible, precise, labor-saving and convenient. Moreover, the structure is compact and reasonable, which improves the overall reliability and reduces the difficulty of operation and maintenance costs.

[0018] Furthermore, the drive assembly includes a drive rod and a second spring. The drive rod is arranged parallel to the top rod. One end of the drive rod is located in the second mounting cavity and connected to the top rod via a connecting rod. The other end of the drive rod slides out of the second mounting cavity and extends into the lock hole. The drive rod is configured such that when the lock rod is engaged with the lock hole, the other end of the drive rod can abut against the guide slope. The second spring is sleeved on the drive rod, with one end fixed to the drive rod and the other end fixed to the inner wall of the second mounting cavity.

[0019] Based on the aforementioned technical means, the extension and retraction of the top rod can be achieved through the cooperation of the drive rod and the second spring, thereby facilitating the smooth opening of the manhole cover and ensuring its complete sealing. Specifically, during the engagement of the locking rod and the locking hole, the guide slope of the locking rod abuts against the other end of the drive rod, allowing the drive rod to retract the top rod into the second mounting cavity. The second spring provides elastic force to the drive rod, causing the retracted drive rod to tend to extend the top rod out of the second mounting cavity. Thus, when the locking rod disengages from the drive rod, the elastic force of the second spring enables the drive rod to automatically reset and stably transmit power, thereby driving the top rod to extend out of the second mounting cavity and lifting the manhole cover, thus facilitating the smooth and easy opening of the manhole cover. The structure is compact, reducing the failure rate and improving work efficiency.

[0020] Furthermore, there are two locking rods and two locking holes. The two locking rods are arranged symmetrically at the center, and one end of each rod is connected to a rack. Both racks mesh with gears, and the two locking holes correspond to one of the locking rods.

[0021] Based on the aforementioned technical means, the self-locking stability of the manhole cover is enhanced by two centrally symmetrical locking rods and cooperating locking holes and racks, preventing accidental opening of the manhole cover. When unlocking, the gears drive the two racks and locking rods to move simultaneously, achieving rapid unlocking, improving operational efficiency, and the overall structure is subjected to balanced forces, extending the overall service life and reducing maintenance costs.

[0022] Furthermore, at least two drainage grooves are formed on the manhole cover body.

[0023] Based on the above-mentioned technical means, by designing at least two drainage grooves, the drainage capacity of the manhole cover body is improved, which can quickly and effectively drain the accumulated water, avoid waterlogging on urban roads, ensure the safety and smooth travel of pedestrians and vehicles, and improve the practicality and functionality of the manhole cover body.

[0024] Furthermore, anti-slip protrusions are formed on the upper surface of both the manhole base and the manhole cover body.

[0025] Based on the above-mentioned technical means, by setting anti-slip protrusions on the upper surface of the manhole base and manhole cover, the friction of the manhole cover area surface is enhanced, significantly improving the safety of pedestrians and vehicles passing through.

[0026] Furthermore, the manhole cover body is hinged to the manhole base via a connecting shaft.

[0027] Based on the above technical means, the manhole cover body is hinged to the manhole base through a connecting shaft, which not only ensures the connection stability between the manhole cover body and the manhole base, avoiding the occurrence of loss or displacement of the manhole cover, effectively improving the safety and reliability of the use of the manhole cover, but also ensures the flexible opening and closing of the manhole cover body, making the operation more convenient and labor-saving.

[0028] The beneficial effects achieved by this utility model are:

[0029] 1. This utility model, through the cooperation of the locking rod and the locking hole, and combined with the guide slope on the locking rod, allows the locking rod to automatically retract and extend when it contacts the inner wall of the well cover, thereby engaging with the locking hole. This enables the well cover body to automatically lock when closed, eliminating the need for manual locking by personnel. The operation is simple and efficient. Furthermore, the first installation cavity provides a closed installation environment for the locking rod, preventing external factors such as rainwater and dust from corroding the locking rod, extending the service life of the self-locking mechanism, and reducing the maintenance frequency and cost caused by component damage.

[0030] 2. This utility model uses an unlocking component to drive the locking rod back into the first mounting cavity, thereby disengaging the locking rod from the lock hole and enabling easy opening of the manhole cover. It features a simple structure, easy operation, and improved work efficiency. It effectively avoids problems such as easy blockage and corrosion of the keyhole and the need to carry a key, which are common with traditional manhole covers that require a key to open. This enhances the convenience and reliability of manhole cover use and reduces maintenance costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0032] Figure 2 This is a cross-sectional view of the manhole cover body of this utility model;

[0033] Figure 3 This is an exploded view of the well base, well cover body, self-locking mechanism, unlocking component, and top rod of this utility model;

[0034] Figure 4 This is a cross-sectional view of the first mounting cavity and the second mounting cavity of this utility model.

[0035] Among them, 1-well base; 11-protrusion; 12-lock hole; 13-second mounting cavity; 14-anti-slip protrusion; 15-connecting shaft; 2-well cover body; 21-first mounting cavity; 22-drainage groove; 31-locking rod; 311-guide slope; 32-first spring; 4-unlocking component; 41-rotating shaft; 42-handle; 43-gear; 44-rack; 45-slider; 46-slide groove; 51-top rod; 52-drive rod; 53-second spring; 54-connecting rod.

[0036] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0039] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0040] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0041] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0042] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0043] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings.

[0044] This embodiment relates to a self-locking manhole cover structure, such as... Figure 1 and Figure 4 The device includes: a manhole base 1 and a manhole cover body 2, the manhole cover body 2 being hinged to the manhole base 1. A boss 11 is formed on the inner wall of the manhole base 1, the boss 11 being configured to abut against the manhole cover body 2 when the manhole cover body 2 is closed; a self-locking mechanism, the self-locking component including a locking rod 31 and a locking hole 12 formed on the inner wall of the manhole base 1, a first mounting cavity 21 being formed inside the manhole cover body 2, one end of the locking rod 31 being installed in the first mounting cavity 21 and connected to an unlocking component 4, the other end sliding out of the first mounting cavity 21 and forming a guide slope 311, the locking rod 31 being configured such that during the stroke of the manhole cover body 2 being closed, the guide slope 311 can abut against the inner wall of the manhole base 1, so that the locking rod 31 retracts into the first mounting cavity 21; when the manhole cover body 2 is closed, the locking rod 31 can extend out of the first mounting cavity 21 and engage with the locking hole 12, so that the manhole cover body 2 and the manhole base 1 are locked.

[0045] In this embodiment, through the cooperation of the locking rod 31, the locking hole 12, and the guide slope 311 on the locking rod 31, the locking rod 31 automatically retracts during the closing stroke by contacting the guide slope 311 with the inner wall of the well seat 1, thus avoiding obstruction to the closing of the well cover body 2 and ensuring the smooth closing of the well cover body 2. When the locking rod 31 corresponds to the locking hole 12, the locking rod 31 extends and engages with the locking hole 12, realizing automatic locking of the well cover body 2 when closed, without the need for manual locking by personnel. The operation is simple and efficient. Moreover, the first mounting cavity 21 provides a closed installation environment for the locking rod 31, avoiding the corrosion of the locking rod 31 by rainwater, dust, etc., and extending the service life of the self-locking mechanism. Specifically, as a preferred embodiment of this embodiment, such as Figure 2 As shown, the manhole cover body 2 is hinged to the manhole base 1 via a connecting shaft 15. This not only ensures the connection stability between the manhole cover body 2 and the manhole base 1, but also ensures the flexible opening and closing of the manhole cover body 2. In practical applications, a protrusion 11 is provided on the inner wall of the manhole base 1 to abut against the manhole cover body 2 when it is closed, providing stable support and limiting for the manhole cover body 2, enhancing the stability and smoothness of the manhole cover body 2 after it is closed. When the manhole cover body 2 is closed, it is embedded in the manhole base 1, ensuring the flatness of the road surface. During the closing stroke, when the guide slope 311 of the locking rod 31 abuts against the inner wall of the manhole base 1, the guide slope 311 acts as a guide. When the manhole cover body 2 is fully closed, the locking rod 31 automatically retracts into the first mounting cavity 21 to ensure that the manhole cover body 2 can be smoothly closed. When the manhole cover body 2 is fully closed, the locking rod 31 corresponds to the locking hole 12, and the locking rod 31 automatically extends and resets, thereby engaging with the locking hole 12 to achieve automatic locking between the manhole cover body 2 and the manhole seat 1. When it is necessary to open the manhole cover body 2, the locking rod 31 is driven to retract into the first mounting cavity 21 through the unlocking component 4, and the locking rod 31 disengages from the locking hole 12, thereby unlocking the manhole cover body 2 and the manhole seat 1. The structure is simple, the operation is convenient, the work efficiency and practicality are improved, the convenience and reliability of the manhole cover are enhanced, and the maintenance cost is reduced.

[0046] like Figure 3 and Figure 4 As shown, in this embodiment, the self-locking mechanism further includes a first spring 32, which is sleeved on the locking rod 31. One end of the first spring 32 is fixed on the locking rod 31, and the other end is fixed on the inner wall of the first mounting cavity 21. The first spring 32 is configured to provide a spring force to the locking rod 31, which is retracted into the first mounting cavity 21, to extend out of the first mounting cavity 21.

[0047] In this embodiment, the first spring 32 provides elastic force to the locking rod 31, causing the locking rod 31, which is retracted into the first mounting cavity 21, to tend to extend out of the first mounting cavity 21. Thus, when there is no external force obstructing the locking rod 31, it can automatically extend out of the first mounting cavity 21. This not only ensures the stability of the automatic engagement between the locking rod 31 and the locking hole 12 when the manhole cover body 2 is closed, ensuring the reliability of the self-locking function between the manhole cover body 2 and the manhole seat 1, but also enables the locking rod 31 to quickly reset after the manhole cover body 2 and the manhole seat 1 are unlocked, preparing for the next self-locking when closing the cover. This improves the overall performance and ease of use of the manhole cover's self-locking and unlocking.

[0048] like Figure 2 and Figure 4 As shown, in this embodiment, the unlocking component 4 includes a rotating shaft 41, a handle 42, a gear 43, and a rack 44. One end of the rotating shaft 41 is rotatably installed in the first mounting cavity 21, and the other end extends out of the first mounting cavity 21 and is connected to the handle 42. The gear 43 is coaxially fixed on the rotating shaft 41. The rack 44 is slidably installed in the first mounting cavity 21 along the axial direction of the locking rod 31 and meshes with the gear 43. One end of the locking rod 31 is connected to the rack 44.

[0049] This embodiment achieves the unlocking function between the manhole cover body 2 and the manhole base 1 through the cooperation of the rotating shaft 41, handle 42, gear 43 and rack 44. Specifically, by rotating the handle 42, the rotating shaft 41 and gear 43 are driven to rotate, thereby driving the rack 44 to move along its length direction, so as to drive the locking rod 31 back into the first mounting cavity 21, so that the locking rod 31 is disengaged from the locking hole 12, thereby unlocking the manhole cover body 2 and the manhole base 1. At the same time, the first spring 32 stores the force for the reset of the locking rod 31. The structure transmission is precise, stable and reliable. The operator only needs to simply rotate the handle 42 to easily complete the unlocking, which simplifies the manhole cover opening process, is not easily affected by external environmental factors, improves the convenience and reliability of manhole cover unlocking, and reduces maintenance difficulty and cost.

[0050] like Figure 3 and Figure 4 As shown, in this embodiment, the unlocking component 4 also includes a slider 45, a rack 44 is mounted on the slider 45, and a groove 46 is formed on the inner wall of the first mounting cavity 21 along the length direction of the rack 44, and the slider 45 is slidably mounted in the groove 46.

[0051] In this embodiment, the cooperation between the slider 45 and the groove 46 provides precise guidance and stable support for the movement of the rack 44, avoiding problems such as offset and wobbling of the rack 44 during transmission. This ensures the smoothness and accuracy of the meshing transmission between the gear 43 and the rack 44, thereby guaranteeing the smoothness and reliability of the unlocking operation and improving the overall stability and service life.

[0052] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, a push rod 51 and a drive assembly are also included. A second mounting cavity 13 is formed in the boss 11. The push rod 51 is located in the second mounting cavity 13, and one end of it is connected to the drive assembly. The other end is configured to slide out of the second mounting cavity 13. The drive assembly is configured to drive the push rod 51 to slide along its axial direction, so that the push rod 51 retracts into the second mounting cavity 13 to cover the manhole cover body 2; or so that the push rod 51 extends out of the second mounting cavity 13 and abuts against the lower end face of the manhole cover body 2 to open the manhole cover body 2.

[0053] In this embodiment, a push rod 51 is provided on the boss 11. Driven by the drive assembly, the push rod 51 slides axially in the second mounting cavity 13. When extended, it abuts against the lower end face of the manhole cover body 2 to lift the manhole cover body 2, which helps to open the manhole cover body 2 smoothly. This avoids the problem of the manhole cover body 2 being stuck with the manhole seat 1 due to excessive pressure or small fitting gap, which makes it difficult to open. When the manhole cover body 2 is closed, it retracts into the second mounting cavity 13 to ensure that the manhole cover body 2 is completely closed. The structure is simple, and the opening and closing operation of the manhole cover body 2 is more flexible, precise, labor-saving and convenient. Moreover, the structure is compact and reasonable, which improves the overall reliability and reduces the difficulty of operation and maintenance costs.

[0054] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the driving assembly includes a driving rod 52 and a second spring 53. The driving rod 52 is arranged parallel to the top rod 51. One end of the driving rod 52 is located in the second mounting cavity 13 and is connected to the top rod 51 through a connecting rod 54. The other end of the driving rod 52 slides out of the second mounting cavity 13 and extends into the lock hole 12. The driving rod 52 is configured such that when the lock rod 31 is engaged with the lock hole 12, the other end of the driving rod 52 can abut against the guide slope 311. The second spring 53 is sleeved on the driving rod 52, with one end fixed to the driving rod 52 and the other end fixed to the inner wall of the second mounting cavity 13.

[0055] In this embodiment, the cooperation of the drive rod 52 and the second spring 53 enables the extension and retraction of the top rod 51, facilitating the smooth opening of the manhole cover body 2 and ensuring its complete closing. Specifically, during the engagement of the locking rod 31 with the locking hole 12, the guide slope 311 of the locking rod 31 abuts against the other end of the drive rod 52, allowing the drive rod 52 to retract the top rod 51 into the second mounting cavity 13. The second spring 53 provides elastic force to the drive rod 52, causing the retracted drive rod 52 to tend to extend the top rod 51 out of the second mounting cavity 13. Thus, when the locking rod 31 disengages from the drive rod 52, the second spring 53... The elastic force enables the automatic reset and stable transmission of the drive rod 52, thereby driving the top rod 51 to extend out of the second mounting cavity 13 and lift the manhole cover body 2 to facilitate the smooth and easy opening of the manhole cover body 2. The structure is compact, reduces the failure rate, and improves work efficiency. Among them, the end of the drive rod 52 that abuts against the guide slope 311 of the locking rod 31 forms a slope or smooth flange, so that during the stroke of the locking rod 31 engaging with the locking hole 12, the guide slope 311 can smoothly push the drive rod 52 to move along its axial direction, thereby driving the top rod 51 to retract into the second mounting cavity 13, ensuring the complete closing of the manhole cover body 2. At the same time, the second spring 53 stores the reset force for the drive rod 52.

[0056] Furthermore, in a preferred embodiment of this invention, there are two locking rods 31 and two locking holes 12. The two locking rods 31 are arranged symmetrically at the center, and one end of each is connected to a rack 44. Both racks 44 mesh with gears 43, and the two locking holes 12 correspond to one of the locking rods 31. Figure 2 As shown, this embodiment enhances the self-locking stability of the manhole cover body 2 by using two centrally symmetrical locking rods 31, and cooperating locking holes 12 and racks 44, preventing accidental opening of the manhole cover body 2. When unlocking, the gear 43 drives the two racks 44 and locking rods 31 to move simultaneously, achieving rapid unlocking, improving operating efficiency, and the overall structure is subjected to balanced force, extending the overall service life and reducing maintenance costs.

[0057] like Figure 1 and Figure 2 As shown in this embodiment, at least two drainage grooves 22 are formed on the manhole cover body 2.

[0058] This embodiment improves the drainage capacity of the manhole cover body 2 by designing at least two drainage grooves 22, which can quickly and effectively drain accumulated water, avoid waterlogging on urban roads, ensure the safety and smooth travel of pedestrians and vehicles, and improve the practicality and functionality of the manhole cover body 2.

[0059] like Figure 1 and Figure 2As shown in the figure, in this embodiment, anti-slip protrusions 14 are formed on the upper surface of both the well base 1 and the well cover body 2.

[0060] This embodiment enhances the friction of the manhole cover area by providing anti-slip protrusions 14 on the upper surface of the manhole base 1 and the manhole cover body 2, which significantly improves the safety of pedestrians and vehicles passing through.

[0061] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A self-locking manhole cover structure, characterized in that, include: The manhole base (1) and the manhole cover body (2) are hinged to the manhole base (1). A boss (11) is formed on the inner wall of the manhole base (1). The boss (11) is configured to abut against the manhole cover body (2) when the manhole cover body (2) is closed. The self-locking mechanism includes a locking rod (31) and a locking hole (12) formed on the inner wall of the well seat (1). A first mounting cavity (21) is formed inside the well cover body (2). One end of the locking rod (31) is installed in the first mounting cavity (21) and connected to an unlocking component (4). The other end slides out of the first mounting cavity (21) and forms a guide slope (311). The locking rod (31) is configured such that during the stroke of the well cover body (2) being closed, the guide slope (311) can abut against the inner wall of the well seat (1) so that the locking rod (31) is retracted into the first mounting cavity (21). When the well cover body (2) is closed, the locking rod (31) can extend out of the first mounting cavity (21) and engage with the locking hole (12) so that the well cover body (2) and the well seat (1) are locked.

2. The self-locking manhole cover structure according to claim 1, characterized in that, The self-locking mechanism further includes a first spring (32), which is sleeved on the locking rod (31), with one end fixed to the locking rod (31) and the other end fixed to the inner wall of the first mounting cavity (21). The first spring (32) is configured to provide a spring force that extends the locking rod (31) out of the first mounting cavity (21) when it retracts into the first mounting cavity (21).

3. The self-locking manhole cover structure according to claim 1, characterized in that, The unlocking assembly (4) includes a rotating shaft (41), a handle (42), a gear (43), and a rack (44). One end of the rotating shaft (41) is rotatably installed in the first mounting cavity (21), and the other end extends out of the first mounting cavity (21) and is connected to the handle (42). The gear (43) is coaxially fixed on the rotating shaft (41). The rack (44) is slidably installed in the first mounting cavity (21) along the axial direction of the locking rod (31) and meshes with the gear (43). One end of the locking rod (31) is connected to the rack (44).

4. The self-locking manhole cover structure according to claim 3, characterized in that, The unlocking component (4) further includes a slider (45), the rack (44) is mounted on the slider (45), and a groove (46) is formed on the inner wall of the first mounting cavity (21) along the length direction of the rack (44), and the slider (45) is slidably mounted in the groove (46).

5. A self-locking manhole cover structure according to claim 1, characterized in that, It also includes a push rod (51) and a drive assembly. A second mounting cavity (13) is formed in the boss (11). The push rod (51) is located in the second mounting cavity (13), and one end of it is connected to the drive assembly. The other end is configured to slide out of the second mounting cavity (13). The drive assembly is configured to drive the push rod (51) to slide along its axial direction, so that the push rod (51) retracts into the second mounting cavity (13) to cover the manhole cover body (2); or to extend the push rod (51) out of the second mounting cavity (13) and abut against the lower end face of the manhole cover body (2) to open the manhole cover body (2).

6. A self-locking manhole cover structure according to claim 5, characterized in that, The drive assembly includes a drive rod (52) and a second spring (53). The drive rod (52) is arranged parallel to the top rod (51). One end of the drive rod (52) is located in the second mounting cavity (13) and connected to the top rod (51) through a connecting rod (54). The other end of the drive rod (52) slides out of the second mounting cavity (13) and extends into the lock hole (12). The drive rod (52) is configured such that when the lock rod (31) is engaged with the lock hole (12), the other end of the drive rod (52) can abut against the guide slope (311). The second spring (53) is sleeved on the drive rod (52), with one end fixed on the drive rod (52) and the other end fixed on the inner wall of the second mounting cavity (13).

7. A self-locking manhole cover structure according to claim 3, characterized in that, There are two locking rods (31) and two locking holes (12). The two locking rods (31) are arranged symmetrically at the center, and one end of each is connected to a rack (44). Both racks (44) mesh with gears (43). The two locking holes (12) correspond to one of the locking rods (31).

8. A self-locking manhole cover structure according to claim 1, characterized in that, At least two drainage grooves (22) are formed on the manhole cover body (2).

9. A self-locking manhole cover structure according to claim 1, characterized in that, The upper surfaces of both the well base (1) and the well cover body (2) are provided with anti-slip protrusions (14).

10. A self-locking manhole cover structure according to claim 1, characterized in that, The manhole cover body (2) is hinged to the manhole base (1) via a connecting shaft (15).

Images