A landscape-style manhole cover auxiliary device

Abstract

This utility model discloses a landscape-style manhole cover auxiliary device, including a manhole base, a manhole cover, a hinge part, and a disassembly part. The hinge end of the hinge part is connected to the manhole base and the manhole cover respectively. The disassembly part has a disassembly chamber; a rotating convex plate disposed in the disassembly chamber; a drive shaft disposed in the disassembly chamber; and an inclined step disposed on the side of the manhole cover corresponding to the disassembly chamber. This utility model can maintain the integrity of the landscape manhole cover surface, achieving seamless integration with the surrounding landscape and fully meeting the requirements of high-end scenes such as parks and cultural tourism blocks for a seamless appearance. By utilizing the cooperation between the lifting inclined surface of the rotating plate convex plate and the lower inclined surface of the manhole cover, the rotational force is converted into an upward lifting force. The torque is amplified through gear transmission, and only one person needs to turn the drive knob to complete the initial separation of the manhole cover, solving the problem of the difficulty in opening heavy landscape manhole covers and saving more effort compared to the traditional hard prying method.

Description

Technical Field

[0001] This utility model relates to the field of landscape manhole cover technology, and in particular to an auxiliary device for landscape manhole covers. Background Technology

[0002] As a carrier for the integration of urban landscape and municipal functions, landscape manhole covers have one of their core design goals to achieve absolute flatness and environmental concealment on the top surface. Especially in high-end landscape areas such as parks, squares, and cultural and tourism blocks, the requirements for manhole covers to be "without protrusions, without openings, and without exposed structures" are even more stringent.

[0003] However, existing landscape manhole covers present an irreconcilable contradiction between maintaining flatness and easy opening. To achieve the opening function, traditional designs require operating structures such as lifting rings, grooves, and raised handles on the top surface of the manhole cover, or pre-drilled through-holes on the side. These structures directly compromise the flatness of the manhole cover, not only accumulating dust and dirt and affecting the aesthetic appeal, but also potentially becoming a tripping hazard for pedestrians, completely contradicting the "invisible" design concept of landscape manhole covers. If these structures are removed to maintain flatness, the manhole cover will lack a point of leverage when opening, requiring brute force to pry it open, which can easily damage the edges of the manhole cover or the decorative layer, such as stone or ceramic veneer. To meet the requirements of load-bearing capacity and durability, landscape manhole covers often use heavy materials such as cast iron and stone composites, with a weight generally exceeding 50 kg. Existing auxiliary opening devices, such as built-in springs and levers, either require complex linkage structures inside the manhole cover, increasing weight and manufacturing difficulty, or rely on temporary contact between external tools and the surface of the manhole cover, which is prone to slipping and inefficient. Especially when the manhole cover is tightly fitted to the manhole seat due to long-term pressure and siltation, the initial separation stage requires a huge lifting force, which is often difficult for a single person to complete. Multiple people must cooperate or large equipment must be used, which seriously affects maintenance efficiency.

[0004] Some manhole cover designs attempt to place the force application point on the side of the manhole cover, such as a hidden groove. However, because the gap between the side of the manhole cover and the manhole seat is extremely small when the cover is closed, usually ≤5mm, the groove depth is limited and it is easily blocked by mud and sand, making it difficult for tools to be inserted and apply force stably. Even if it is forced to be inserted, the angle between the direction of force application and the direction of gravity of the manhole cover is too large, resulting in insufficient effective lifting force, which may instead cause deformation of the side of the manhole cover or loosening of the manhole seat. Utility Model Content

[0005] The purpose of this utility model is to provide a landscape-style manhole cover auxiliary device to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a landscape-style manhole cover auxiliary device, including a manhole base, a manhole cover, a hinge portion disposed on one side of the manhole base, and a disassembly / assembly portion disposed on the other side of the manhole base away from the hinge portion. The hinge end of the hinge portion is connected to the manhole base and the manhole cover respectively. The disassembly / assembly portion has:

[0008] The disassembly compartment is connected to the placement slot in the well base for placing the well cover, and the space inside the disassembly compartment is in communication with the space inside the placement slot. The disassembly compartment is provided with a compartment cover, and the top surface of the compartment cover is flush with the top surface of the well cover.

[0009] A rotating convex plate is provided inside the disassembly chamber. It has a rotating plate and a rotating shaft located at the center of rotation of the rotating plate, as well as a first gear connected to the rotating shaft by a key. The top surface of the rotating plate is provided with a convex part. The convex part is provided with a horizontal surface, a rising inclined surface and a falling inclined surface connected in sequence along the circumference of the rotating shaft.

[0010] The drive shaft, located inside the disassembly chamber, includes a shaft body, a second gear connected to the shaft body via a key, and a drive knob located at the end of the shaft body. The drive knob is located on the chamber cover, and the second gear is drively connected to the first gear.

[0011] An inclined step is provided on the side of the manhole cover corresponding to the disassembly compartment. The top surface of the inclined step protrudes downward to form a lower inclined surface on both sides of the middle. The top surface of the step is located above the rotating plate. When the rotating shaft is subjected to force and rotates, the rising inclined surface on the rotating plate abuts against the lower inclined surface during the rotation and lifts the manhole cover away from the placement groove.

[0012] In the initial state of this technical solution, the manhole cover is closed within the placement slot, with the horizontal surface of the rotating plate's protrusion facing the top surface of the manhole cover's step, maintaining a 1-2cm gap. The active knob is concealed within the cover, and the overall surface structure is flat. When preparing to open, a wrench or other rotating device is used to apply force to the active knob, rotating it clockwise. This causes the second gear to drive the first gear to rotate, and the rotating plate rotates synchronously with the rotating shaft. The rising slope of the protrusion gradually contacts the lower slope of the manhole cover, creating relative sliding. Due to the guiding effect of the slope, the rotational force is decomposed into a vertically upward lifting force, lifting the side of the manhole cover away from the hinge until the rising slope reaches its highest point. At this point, the manhole cover separates from the placement slot by 5-10cm, achieving initial separation between the manhole cover and the base, facilitating subsequent operations. When closing the manhole cover, the active knob is rotated in the opposite direction. The descending slope of the rotating plate's protrusion engages with the lower slope of the manhole cover, guiding the manhole cover slowly back into the placement slot. Finally, the horizontal surface of the protrusion realigns with the top surface of the step.

[0013] This technical solution maintains the integrity of the landscape manhole cover surface. By integrating all auxiliary structures into the disassembly compartment of the manhole base, no lifting interfaces, grooves, or protrusions are needed on the top surface of the manhole cover. The design of the compartment cover being flush with the top surface of the manhole cover achieves seamless integration with the surrounding landscape, fully meeting the requirements of high-end scenarios such as parks and cultural tourism districts for a non-obtrusive appearance. Utilizing the cooperation between the lifting ramp of the rotating plate protrusion and the lower ramp of the manhole cover, the rotational force is converted into an upward lifting force. The torque is amplified through gear transmission, and the initial separation of the manhole cover can be completed by a single person turning the active knob. This solves the problem of the difficulty in opening heavy landscape manhole covers and is more labor-saving than the traditional hard prying method. At the same time, the mechanical transmission method of rotating the active knob and lifting the ramp avoids the risk of tool slippage or sudden bounce.

[0014] As an extension of the above solution: the cover is provided with a countersunk hole, the shaft passes through the countersunk hole, and the active knob is located within the countersunk area of ​​the countersunk hole, with a rubber plug installed in the countersunk area. Through the design of the countersunk hole, the active knob is completely hidden within the countersunk area of ​​the cover, and the rubber plug seals the countersunk area, achieving a zero-protrusion connection between the top surface of the cover and the top surface of the manhole cover. This completely eliminates the visual abruptness of traditional exposed knobs and meets the stringent requirements for paving consistency in high-end landscape areas.

[0015] As an extension of the above solution, a slewing bearing is provided between the bottom surface of the rotating plate and the bottom wall of the disassembly chamber. The slewing bearing evenly transmits the radial and axial loads of the rotating plate to the bottom wall of the disassembly chamber, preventing the rotating plate from tilting or swaying due to uneven force, ensuring that the inclined surface of the rising plate and the lower inclined surface of the manhole cover always maintain stable contact, and solving the jamming problem during rotation in traditional planar contact.

[0016] As an extension of the above solution: the rotating shaft is keyed to a ratchet located below the rotating plate, the ratchet is located on the inner ring of the slewing bearing, and the inner side of the slewing bearing is provided with a pawl, the pawl and the ratchet are connected to each other to make the rotating plate rotate in one direction.

[0017] In this extended solution, the ratchet and pawl lock in a one-way manner to ensure that the rotating plate can only rotate in the lifting direction, preventing the rotating plate from reversing due to operational errors or the weight of the manhole cover, thus avoiding safety hazards caused by the sudden fall of the manhole cover. This solution is especially suitable for single-person operation scenarios.

[0018] As an extension of the above solution: the placement groove is equipped with a ring-shaped support platform for supporting the manhole cover, and the support surface of the ring-shaped support platform is flush with the bottom wall of the disassembly compartment. This extended solution effectively improves the load-bearing stability of the manhole cover. The ring-shaped support platform provides a continuous and uniform support surface for the manhole cover. Compared with traditional partial support structures, it can distribute the load on the manhole cover, such as vehicle crushing and pedestrian trampling, to the entire manhole base, avoiding deformation or breakage of the manhole cover due to excessive local stress. It is especially suitable for heavy-duty landscape manhole covers.

[0019] As an extension of the above solution: the wall of the placement groove is inclined, and the inclination is set to be larger at the top and smaller at the bottom, expanding outwards from the top, and the side of the manhole cover is fitted to the wall of the placement groove.

[0020] This extended solution significantly improves installation convenience. The inclined design of the groove wall, wider at the top and narrower at the bottom, forms a guide ramp. When lowering the manhole cover, precise alignment is not required; it automatically slides into the preset position along the groove wall, greatly reducing the positioning difficulty during installation. This is especially suitable for construction scenarios at night or in low light conditions, allowing a single person to complete the manhole cover repositioning operation. After the side of the manhole cover fits tightly against the inclined groove wall, the groove wall provides radial restraint to the manhole cover, effectively offsetting the horizontal impact force generated by vehicle driving and pedestrian trampling. This avoids the shaking or abnormal noise of manhole covers caused by excessive gaps in traditional straight-walled grooves, improving safety during use.

[0021] As an extension of the above solution: the side of the manhole cover is provided with a groove, which is formed by the inward recess of the side of the manhole cover and is located above the inclined step;

[0022] The auxiliary device also includes an external pry bar assembly, which includes a support column and a rod body that is universally connected to the top of the support column. The end of the rod body is provided with a plug-in portion that mates with the slot.

[0023] In this extended solution, the external crowbar assembly can be stored independently without being permanently connected to the manhole cover. This avoids component loss and allows for the replacement of crowbars of different specifications according to the size and weight of the manhole cover, making it suitable for various landscape scenarios such as parks, municipal roads, and scenic areas. The slot is located above the sloping steps. When the rotating plate lifts the manhole cover and the edge is separated from the manhole seat, the slot is exposed, and the crowbar can be inserted without additional adjustment, achieving a seamless connection between lifting and prying, reducing operation steps and improving maintenance efficiency.

[0024] As an extension of the above solution: the top of the disassembly chamber wall is provided with a fulcrum groove, the fulcrum groove is provided with an internal thread, and the lower part of the support column is provided with an external thread corresponding to the internal thread of the fulcrum groove. Through the precise matching of the internal thread of the fulcrum groove and the external thread of the support column, the problems of slippage, settlement or displacement of traditional ground fulcrums are completely solved, making the force transmission during the prying process more direct and stable, and sufficient lifting force can be generated by a single person.

[0025] As an extension of the above solution: the hinge part has a hinge frame and a hinge member disposed in the hinge frame. The hinge frame is connected to the placement groove, and the space inside the hinge frame is in communication with the space inside the placement groove. The side of the manhole cover is provided with a first hinge hole, and the side wall of the hinge frame is provided with a second hinge hole. The hinge member has a first hinge shaft and a second hinge shaft. The first hinge shaft is assembled in the first hinge hole, and the second hinge shaft is assembled in the second hinge hole.

[0026] This extended solution increases the opening stroke, enabling the manhole cover to be fully rotated. Through the coordinated rotation of the first and second hinge shafts, it breaks through the angle limitation of traditional single-axis rotation, increasing the opening angle of the manhole cover. After opening, one end of the manhole cover can contact the ground support, completely exposing the manhole opening and facilitating all-round operations for maintenance personnel.

[0027] As an extension of the above solution: the hinge is a T-shaped structural block, the T-shaped structural block has a horizontal section and a vertical section, the vertical section is provided with a first shaft hole through the horizontal section, the first hinge shaft is disposed in the first shaft hole and its two ends are respectively connected to the first hinge hole of the manhole cover, the horizontal section is provided with a second shaft hole parallel to the first shaft hole, the second hinge shaft is disposed in the second shaft hole and its two ends are respectively connected to the second hinge hole of the hinge frame.

[0028] This extended solution avoids the safety hazards of manhole covers being upright or tilted. The dual-axis rotation design allows the manhole cover to be in a final position with at least one end on the ground after being opened, rather than being upright or tilted as in the traditional single-axis configuration. This eliminates the risk of the manhole cover tipping over and injuring people when upright, and the risk of it shaking due to external forces when tilted. It is especially suitable for landscape areas with high pedestrian traffic and avoids the safety hazards of the manhole cover being upright after being opened in the traditional configuration. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0030] Figure 1 This is a schematic diagram of the structure of the manhole cover auxiliary device in the embodiment;

[0031] Figure 2 This is an exploded structural diagram of the manhole cover auxiliary device in the embodiment;

[0032] Figure 3 This is an enlarged schematic diagram of part of the structure of the manhole cover, rotating convex plate, and drive shaft in the embodiment.

[0033] In the attached diagram: 100: well base, 110: placement groove, 111: annular support platform, 200: well cover, 210: slot, 300: hinge part, 310: hinge frame, 320: hinge component, 400: disassembly part, 410: disassembly compartment, 411: fulcrum groove, 420: compartment cover, 421: countersunk through hole, 430: rotating convex plate, 431: rotating plate, 432: rotating shaft, 433: first gear, 434: convex part, 440: drive shaft, 441: shaft body, 442: second gear, 443: drive knob, 500: inclined step, 510: lower inclined surface. Detailed Implementation

[0034] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 3 The following are several embodiments of a landscape-style manhole cover auxiliary device of this utility model.

[0039] like Figures 1 to 3 As shown, an embodiment of this utility model provides a landscape-style manhole cover auxiliary device, including a manhole base 100, a manhole cover 200, a hinge portion 300 disposed on one side of the manhole base 100, and a disassembly / assembly portion 400 disposed on the other side of the manhole base 100 away from the hinge portion 300. The hinge ends of the hinge portion 300 are respectively connected to the manhole base 100 and the manhole cover 200. The disassembly / assembly portion 400 has:

[0040] The disassembly compartment 410 is connected to the placement slot 110 in the well base 100 for placing the well cover 200, and the space inside the disassembly compartment 410 is in communication with the space inside the placement slot 110. The disassembly compartment 410 is provided with a compartment cover 420, and the top surface of the compartment cover 420 is flush with the top surface of the well cover 200.

[0041] A rotating convex plate 430 is disposed in the disassembly chamber 410. It has a rotating plate 431, a rotating shaft 432 located at the rotation center of the rotating plate 431, and a first gear 433 connected to the rotating shaft 432 by a key. The top surface of the rotating plate 431 is provided with a protrusion 434. The protrusion 434 is provided with a horizontal surface, a rising inclined surface, and a falling inclined surface connected in sequence along the circumference of the rotating shaft.

[0042] The drive shaft 440 is disposed in the disassembly chamber 410 and includes a shaft body 441, a second gear 442 connected to the shaft body 441 by a key, and a drive knob 443 disposed at the end of the shaft body 441. The drive knob 443 is disposed on the chamber cover 420, and the second gear 442 is connected to the first gear 433 in a transmission connection.

[0043] An inclined step 500 is provided on the side of the manhole cover 200 corresponding to the disassembly compartment 410. The middle part of the top surface of the inclined step 500 protrudes downward to form a lower inclined surface 510 on both sides of the middle part. The top surface of the step is located above the rotating plate 431. When the rotating shaft 432 is subjected to force and rotates, the rising inclined surface on the rotating plate 431 abuts against the lower inclined surface 510 during the rotation process and lifts the manhole cover 200 away from the placement groove 110.

[0044] In this embodiment, the disassembly compartment serves as the mounting carrier for the auxiliary device. Its connection design with the well seat placement groove ensures that the rotating plate protrusion can directly act on the sloping steps of the well cover. The compartment cover uses the same paving material as the well cover, such as granite or wood-look resin, and the flatness error between the edge and the top surface of the well cover is ≤1mm to avoid the risk of tripping.

[0045] The rotating plate is a circular steel plate with a gradually increasing height of the convex top surface from the horizontal plane to the top of the inclined plane, forming a continuous force transmission path. The length of the horizontal plane is 1 / 3 of the circumference of the rotating plate. When the manhole cover is closed, it is located below the inclined plane step. The inclination angle of the inclined plane is 15°-25°. If the angle is too small, the lifting stroke will be insufficient; if it is too large, the required rotational force will increase. The descending inclined plane is symmetrically arranged with the ascending inclined plane for easy resetting. The second gear is connected to the first gear through a meshing transmission. The second gear is the driving gear on the drive shaft, driven by the drive knob. In this embodiment, the second gear is smaller than the first gear, so that the transmission ratio between the second gear and the first gear is 5-6:1. That is, for every 5-6 rotations of the second gear by the drive knob, the first gear rotates 1 rotation. By increasing the number of rotations by the operator and reducing the rotational force, the torque of the rotating plate is increased, ensuring smooth transmission and sufficient strength and lifting force.

[0046] The inclined step is located below the side of the manhole cover. The initial gap between the top surface of the step and the top surface of the rotating plate is 1-2cm to avoid the manhole cover's own weight pressing on the rotating plate. The middle of the inclined step is raised so that the two sides of the lower inclined surface are distributed in an "inverted V-shape". The contact point between the lower inclined surface and the rising inclined surface has a hardness ≥HRC50 and is hardened to prevent long-term friction deformation.

[0047] In the initial state of this embodiment, the manhole cover is closed in the placement slot, with the horizontal surface of the rotating plate protrusion facing the top surface of the manhole cover step, maintaining a gap of 1-2 cm. The active knob is hidden inside the cover, and the overall surface structure is flat. When preparing to open, the active knob is operated by a wrench or other rotating device. If there is a rubber stopper, it is first removed from the cover to expose the active knob. Rotating the active knob clockwise drives the first gear to rotate through the second gear. The rotating plate rotates synchronously with the rotating shaft, and the rising slope of the protrusion gradually contacts the lower slope of the manhole cover and produces relative sliding. Due to the guiding effect of the slope, the rotational force is decomposed into a vertically upward lifting force, lifting the side of the manhole cover away from the hinge until the rising slope rotates to the highest point. At this time, the manhole cover is separated from the placement slot by 5-10 cm, and the manhole cover and the manhole seat are initially separated, facilitating subsequent operations. Subsequent operations (described in detail in the following embodiments) include that after the manhole cover is lifted, the slot on its side is exposed. A pry bar assembly can be inserted into the slot, using the manhole seat as a fulcrum to completely lift the manhole cover. Then reset and close. When closing the manhole cover, rotate the active knob in the opposite direction. The downward slope of the rotating plate protrusion will cooperate with the downward slope of the manhole cover, guiding the manhole cover to slowly fall back into the placement groove. Finally, the horizontal surface of the protrusion will be re-aligned with the top surface of the step.

[0048] Those skilled in the art will understand that the manhole cover is lifted by guiding the top surface of the step and the inclined surface of the rising slope. The lifting height (i.e., the parameters of the rising and lowering slopes) is set according to the actual size and height requirements of the manhole cover. This embodiment does not limit the specific lifting height. For example, in this embodiment, if the manhole cover needs to be lifted by 10cm, the height position is set according to the highest point of the rising slope and the lowest point of the lowering slope to ensure that when the rising slope of the rotating plate is rotated to a certain position, the manhole cover is lifted by 10cm, so that the side slot can be exposed or convenient for subsequent operations.

[0049] This embodiment maintains the integrity of the landscape manhole cover surface. By integrating all auxiliary structures into the disassembly compartment of the manhole base, no lifting interfaces, grooves, or protrusions are needed on the top surface of the manhole cover. The design of the compartment cover flush with the top surface of the manhole cover achieves seamless integration with the surrounding landscape, fully meeting the requirements of high-end scenarios such as parks and cultural tourism districts for a non-obtrusive appearance. Utilizing the cooperation between the lifting ramp of the rotating plate protrusion and the lower ramp of the manhole cover, the rotational force is converted into an upward lifting force. The torque is amplified through gear transmission, allowing for initial separation of the manhole cover with just one person turning the active knob. This solves the problem of laborious opening of heavy landscape manhole covers, requiring less effort compared to traditional prying methods. Furthermore, the mechanical transmission method of rotating the active knob and lifting the ramp avoids the risk of tool slippage or sudden bounce. This embodiment is adaptable to different materials, such as cast iron and stone composite, and landscape manhole covers weighing 50-200kg. During later maintenance, only the compartment cover needs to be opened for inspection of internal components, making it highly adaptable and easy to maintain.

[0050] In an optional embodiment, such as Figure 2 and Figure 3 As shown, the cover 420 is provided with a countersunk through hole. The shaft 441 passes through the countersunk through hole 421, and the active knob 443 is located within the countersunk area of ​​the countersunk through hole 421. A rubber plug is provided in the countersunk area. Through the design of the countersunk through hole, the active knob is completely hidden within the countersunk area of ​​the cover. With the rubber plug sealing the countersunk area, a zero-protrusion connection is achieved between the top surface of the cover and the top surface of the manhole cover, completely eliminating the visual abruptness of traditional exposed knobs and meeting the stringent requirements for paving consistency in high-end landscape areas.

[0051] In an optional embodiment, such as Figure 2 and Figure 3 As shown, a slewing bearing (not shown in the figure) is provided between the bottom surface of the rotating plate 431 and the bottom wall of the disassembly chamber 410.

[0052] In this embodiment, the slewing bearing is a deep groove ball bearing suitable for light and medium loads, or a crossed roller bearing suitable for heavy loads. It consists of an inner ring, an outer ring, rolling elements, and a cage. The inner ring is bolted to the bottom surface of the rotating plate, and the outer ring is bolted to the bottom wall of the disassembly compartment. The rolling elements roll within the raceways of the inner and outer rings, achieving low-friction rotation. The slewing bearing, through the annular rolling elements, evenly transmits the radial and axial loads of the rotating plate to the bottom wall of the disassembly compartment, preventing the rotating plate from tilting or wobbling due to uneven force distribution. This ensures that the inclined surface and the lower inclined surface of the manhole cover maintain stable contact, solving the jamming problem associated with traditional planar contact rotation.

[0053] In an optional embodiment, such as Figure 2 and Figure 3As shown, the rotating shaft 432 is located below the rotating plate 431 and is keyed to a ratchet (not shown in the figure). The ratchet is located in the inner ring of the slewing bearing. The inner side of the slewing bearing is provided with a pawl. The pawl and the ratchet are connected to each other to allow the rotating plate to rotate in one direction. The ratchet is a circular toothed disc structure. The inner hole is connected to the rotating shaft through a flat key. The tooth surface has evenly distributed sawtooth grooves along the circumference. The grooves allow the pawl to withstand axial loads after being engaged, and to slip smoothly during reverse rotation. The ratchet is located below the rotating plate and between the inner ring of the slewing bearing. The top surface of the ratchet is in contact with the bottom surface of the rotating plate, and its outer diameter is smaller than the diameter of the inner ring of the slewing bearing to avoid interference with the outer ring. The pawl is a plate-like structure. One end is hinged to the inner wall of the inner ring of the slewing bearing by a pin, and the other end is a pawl that matches the ratchet tooth groove.

[0054] In this embodiment, the one-way locking mechanism of the ratchet and pawl ensures that the rotating plate can only rotate in the lifting direction, preventing reverse rotation due to operational errors or the weight of the manhole cover. This avoids safety hazards caused by the sudden fall of the manhole cover, making it particularly suitable for single-person operation scenarios. When lifting heavy manhole covers, the operator can perform step-by-step operations through the one-way locking function. After rotating the active knob by a certain angle, the pawl automatically engages with the ratchet teeth, maintaining the current lifting height without continuous external force. This facilitates adjusting the force application posture or taking short breaks, solving the fatigue problem caused by traditional continuous force application, reducing operational intensity, and achieving intermittent labor saving.

[0055] In an optional embodiment, such as Figure 2 As shown, the placement groove 110 is provided with an annular support platform 111 for supporting the manhole cover 200. The support surface of the annular support platform 111 is flush with the bottom wall of the disassembly compartment 410. The annular support platform is a protruding structure extending circumferentially along the inner wall of the placement groove and is integrally formed with the manhole cover. The annular support platform is continuous in the area corresponding to the disassembly compartment, that is, the support surface and the bottom wall of the disassembly compartment are on the same horizontal plane.

[0056] This embodiment effectively improves the load-bearing stability of the manhole cover. The ring support platform provides a continuous and uniform support surface for the manhole cover. Compared with the traditional local support structure, it can distribute the load on the manhole cover, such as vehicle crushing and pedestrian trampling, to the entire manhole seat, avoiding deformation or breakage of the manhole cover due to excessive local stress. It is especially suitable for heavy-duty landscape manhole covers.

[0057] In an optional embodiment, such as Figure 2As shown, the wall of the placement groove 110 is inclined, with the inclination being wider at the top and narrower at the bottom, expanding outwards. The side of the manhole cover 200 is fitted to the wall of the placement groove 110. The wall of the placement groove is the inner wall of the placement groove and is an inclined surface along the axial direction. It has a tapered structure that is wider at the top and narrower at the bottom from the manhole opening to the bottom of the groove, and is integrally formed with the manhole base. The inclination angle is the angle between the wall surface and the vertical direction, preferably 3°-8°. If the angle is too small, the guiding effect will be insignificant; if it is too large, it may cause the manhole cover to slide down under its own weight.

[0058] This embodiment significantly improves installation convenience. The inclined design of the groove wall, wider at the top and narrower at the bottom, forms a guide slope. When lowering the manhole cover, precise alignment is not required; it automatically slides into the preset position along the groove wall, greatly reducing the positioning difficulty during installation. This is especially suitable for construction scenarios at night or in low light conditions, allowing a single person to complete the manhole cover repositioning operation. After the side of the manhole cover fits tightly against the inclined groove wall, the groove wall provides radial restraint to the manhole cover, effectively offsetting the horizontal impact force generated by vehicle driving or pedestrian trampling. This avoids the shaking or abnormal noise of manhole covers caused by excessive gaps in traditional straight-walled grooves, improving safety during use.

[0059] In an optional embodiment, such as Figure 2 and Figure 3 As shown, the manhole cover 200 has a groove 210 on its side. The groove 210 is formed by the inward concavity of the side of the manhole cover 200 and is located above the inclined step 500. The groove is an inward concavity structure on the side of the manhole cover. When the manhole cover is closed, it is covered by the wall of the placement groove of the manhole seat and is not exposed at all. This avoids damaging the flatness of the top surface of the manhole cover and solves the problem of the traditional protruding handle affecting the landscape. It meets the requirements of the landscape-style concealed manhole cover.

[0060] The auxiliary device also includes an external crowbar assembly (not shown in the figure). The crowbar assembly includes a support column and a rod body that is universally connected to the top of the support column. The end of the rod body has a plug-in part that mates with the slot. The plug-in part of the crowbar assembly precisely matches the slot to form a stable force couple fulcrum. Combined with the universal connection structure, the operator can flexibly adjust the force application angle according to the site space, efficiently transferring the leverage force of the crowbar to the manhole cover. Compared with bare hands or ordinary tools, it is more labor-saving, and a single person can fully open a heavy manhole cover.

[0061] In this embodiment, the external crowbar assembly can be stored independently without being permanently connected to the manhole cover. This avoids the loss of parts and allows for the replacement of crowbars of different specifications according to the size and weight of the manhole cover, making it suitable for various landscape scenarios such as parks, municipal roads, and scenic spots. The slot is set above the sloping steps. When the rotating plate lifts the manhole cover and the edge is separated from the manhole seat, the slot is just exposed, and the crowbar can be inserted without additional adjustment, achieving a seamless connection between lifting and prying, reducing operation steps and improving maintenance efficiency.

[0062] In an optional embodiment, the top of the disassembly chamber 410 is provided with a fulcrum groove 411, the fulcrum groove 411 has an internal thread, and the lower part of the support column has an external thread corresponding to the internal thread of the fulcrum groove 411. Through the precise engagement of the internal thread of the fulcrum groove and the external thread of the support column, the problems of slippage, settlement, or displacement of traditional ground fulcrums are completely solved, making the force transmission during the prying process more direct and stable, and sufficient lifting force can be generated by a single operator.

[0063] In an optional embodiment, such as Figure 1 and Figure 2 As shown, the hinge portion 300 has a hinge frame 310 and a hinge member 320 disposed within the hinge frame 310. The hinge frame 310 is connected to the placement groove 110, and the space inside the hinge frame 310 communicates with the space inside the placement groove 110. The side of the manhole cover 200 is provided with a first hinge hole, and the side wall of the hinge frame 310 is provided with a second hinge hole. The hinge member 320 has a first hinge shaft and a second hinge shaft. The first hinge shaft is assembled in the first hinge hole, and the second hinge shaft is assembled in the second hinge hole.

[0064] This embodiment increases the opening stroke to achieve complete flipping of the manhole cover. Through the coordinated rotation of the first and second hinge shafts, it breaks through the angle limitation of traditional single-axis flipping, increasing the opening angle of the manhole cover. After opening, one end of the manhole cover can contact the ground support, completely exposing the manhole opening and facilitating all-round operation by maintenance personnel.

[0065] In an optional embodiment, such as Figure 2 As shown, the hinge 320 is a T-shaped structural block. The T-shaped structural block has a horizontal section and a vertical section. The vertical section has a first shaft hole that runs through it horizontally. The first hinge shaft is disposed in the first shaft hole and its two ends are respectively connected to the first hinge hole of the manhole cover. The horizontal section has a second shaft hole that is parallel to the first shaft hole. The second hinge shaft is disposed in the second shaft hole and its two ends are respectively connected to the second hinge hole of the hinge frame.

[0066] This embodiment avoids the safety hazards of manhole covers being upright or tilted. The dual-axis rotation design allows the manhole cover to be in a final posture with at least one end placed on the ground after being opened, rather than being upright or tilted as in the traditional single-axis configuration. This eliminates the risk of the manhole cover easily tipping over and injuring people when upright, and the risk of it shaking due to external forces when tilted. It is especially suitable for scenic areas with high pedestrian traffic, and avoids the safety hazards of the manhole cover being in an upright position after being opened in the traditional configuration.

[0067] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A landscape cover assist device, characterized by, The well includes a well base (100), a well cover (200), a hinge portion (300) disposed on one side of the well base (100), and a disassembly portion (400) disposed on the other side of the well base (100) away from the hinge portion (300). The hinge ends of the hinge portion (300) are connected to the well base (100) and the well cover (200) respectively. The disassembly portion (400) has: The disassembly compartment (410) is connected to the placement slot (110) in the well base (100) for placing the well cover (200), and the space inside the disassembly compartment (410) is connected to the space inside the placement slot (110). The disassembly compartment (410) is provided with a compartment cover (420), and the top surface of the compartment cover (420) is flush with the top surface of the well cover (200). A rotating convex plate (430) is disposed in the disassembly chamber (410), having a rotating plate (431), a rotating shaft (432) located at the center of rotation of the rotating plate (431), and a first gear (433) connected to the rotating shaft (432) by a key. The top surface of the rotating plate (431) is provided with a protrusion (434), and the protrusion (434) is provided with a horizontal surface, a rising inclined surface, and a falling inclined surface connected in sequence along the circumference of the rotating shaft (432). The drive shaft (440) is disposed in the disassembly chamber (410) and includes a shaft body (441), a second gear (442) connected to the shaft body (441) by a key, and a drive knob (443) disposed at the end of the shaft body (441). The drive knob (443) is disposed on the chamber cover (420). The second gear (442) is drively connected to the first gear (433). A sloping step (500) is provided on the side of the manhole cover (200) corresponding to the disassembly compartment (410). The middle part of the top surface of the sloping step (500) protrudes downward to form a lower sloping surface (510) on both sides of the middle part. The top surface of the step is located above the rotating plate (431). When the rotating shaft (432) is subjected to force and rotates, the rising sloping surface on the rotating plate (431) abuts against the lower sloping surface (510) during the rotation process and lifts the manhole cover (200) away from the placement groove (110).

2. A landscape cover assist device according to claim 1, characterised in that: The cover (420) is provided with a countersunk through hole (421), the shaft (441) is provided through the countersunk through hole (421) and the active knob (443) is located in the countersunk area of ​​the countersunk through hole (421), and the countersunk area is provided with a rubber plug.

3. A landscape cover assist device according to claim 1, wherein: A slewing bearing is provided between the bottom surface of the rotating plate (431) and the bottom wall of the disassembly chamber (410).

4. The landscape-style manhole cover auxiliary device according to claim 3, characterized in that: The rotating shaft (432) is located below the rotating plate (431) and is keyed to a ratchet. The ratchet is located on the inner ring of the slewing bearing. The inner side of the slewing bearing is provided with a pawl. The pawl and the ratchet are connected to each other to make the rotating plate (431) rotate in one direction.

5. The landscape-style manhole cover auxiliary device according to claim 4, characterized in that: The placement slot (110) is provided with an annular support platform (111) for supporting the manhole cover (200). The support surface of the annular support platform (111) is flush with the bottom wall of the disassembly compartment (410).

6. The landscape-style manhole cover auxiliary device according to claim 1, characterized in that: The wall of the placement groove (110) is inclined, and the inclination is set to be larger at the top and smaller at the bottom, with an upward and outward inclination. The side of the manhole cover (200) is fitted to the wall of the placement groove (110).

7. The landscape-style manhole cover auxiliary device according to claim 1, characterized in that: The manhole cover (200) is provided with a slot (210) on its side. The slot (210) is formed by the inward recess of the side of the manhole cover (200) and is located above the inclined step (500). The auxiliary device also includes an external pry bar assembly, which includes a support column and a rod body that is universally connected to the top of the support column. The end of the rod body is provided with a plug-in portion that mates with the slot (210).

8. A landscape-style manhole cover auxiliary device according to claim 7, characterized in that: The top of the disassembly chamber (410) is provided with a fulcrum groove (411), the fulcrum groove (411) is provided with an internal thread, and the lower part of the support column is provided with an external thread corresponding to the internal thread of the fulcrum groove (411).

9. A landscape-style manhole cover auxiliary device according to claim 1, characterized in that: The hinge part (300) has a hinge frame (310) and a hinge member (320) disposed in the hinge frame (310). The hinge frame (310) is connected to the placement groove (110), and the space inside the hinge frame (310) is in communication with the space inside the placement groove (110). The side of the manhole cover (200) is provided with a first hinge hole, and the side wall of the hinge frame (310) is provided with a second hinge hole. The hinge member (320) has a first hinge shaft and a second hinge shaft. The first hinge shaft is assembled in the first hinge hole, and the second hinge shaft is assembled in the second hinge hole.

10. A landscape-style manhole cover auxiliary device according to claim 9, characterized in that: The hinge (320) is a T-shaped structural block. The T-shaped structural block has a horizontal section and a vertical section. The vertical section has a first shaft hole that runs through it horizontally. The first hinge shaft is set in the first shaft hole and its two ends are respectively connected to the first hinge hole of the manhole cover (200). The horizontal section has a second shaft hole that is parallel to the first shaft hole. The second hinge shaft is set in the second shaft hole and its two ends are respectively connected to the second hinge hole of the hinge frame (310).

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