Locking structure and locking method of a well lid

Abstract

The application provides a locking structure and method of a well lid, comprising a well lid body and a well lid base, the two sides of the well lid body are provided with fixing blocks, the fixing blocks are connected with a locking mechanism and are inserted into the well lid base through the locking mechanism, the locking mechanism comprises: a locking structure, comprising a locking assembly, a connecting assembly, a driving assembly and a locking rod, the two ends of the connecting assembly are connected with the locking assembly and the driving assembly respectively, the driving assembly comprises a driving wheel one, a driving wheel two and a driving wheel three, the locking assembly drives the driving wheel one and the driving wheel two to rotate reversely through the connecting assembly, the driving wheel one and the driving wheel two are meshed and connected with the driving wheel three, and the end of the locking rod away from the well lid body is provided with a needle rod; a lock catch structure, comprising a fixed frame, an encapsulation frame, a limiting frame and a plurality of holding balls arranged in the limiting frame; and a magnetic block, which is used for unlocking. The application greatly improves the anti-theft performance through the sequence limitation of the unlocking steps and the direction limitation of the rotating locking assembly.

Description

Technical Field

[0001] This invention belongs to the field of manhole cover technology, specifically relating to a locking structure and locking method for a manhole cover. Background Technology

[0002] Manhole covers are used to cover deep wells in roads or homes to prevent people or objects from falling in. They can be classified by material, such as metal manhole covers, high-strength fiber-reinforced concrete manhole covers, and resin manhole covers. They are generally round. They can be used in green belts, sidewalks, driveways, docks, alleyways, etc.

[0003] In existing technologies, manhole covers are easily stolen due to their material. Therefore, most manhole covers are equipped with locking structures to lock them to the base. Patent CN212896479U discloses a municipal manhole cover with anti-theft function, including a base and a cover body connected to the base. A locking assembly is installed inside the cover body, comprising a rotating adjusting shaft and an adjusting screw. The adjusting screw is driven by the rotating adjusting shaft and moves telescopically through the rotating adjusting shaft to the protrusion. A limiting hole adapted to the adjusting screw is provided on the groove. By using the rotating adjusting shaft to drive the adjusting screw to move telescopically, and then cooperating with the limiting hole to achieve the locking function, the anti-theft capability is greatly improved. However, since it only achieves locking through the telescopic movement of the adjusting screw, the locking state is unstable. The structure is simple and the disassembly mechanism is easy to understand, so the risk of theft remains relatively high. Summary of the Invention

[0004] The purpose of this invention is to provide a locking structure and locking method for manhole covers, which greatly improves anti-theft performance by restricting the order of unlocking steps and the direction of rotation of the locking component.

[0005] This invention provides the following technical solution:

[0006] This application proposes a locking structure for a manhole cover, including a manhole cover body and a manhole cover base. Fixing blocks are provided on both sides of the manhole cover body. Each fixing block is connected to a locking mechanism and is inserted into the manhole cover base via the locking mechanism. The locking mechanism includes:

[0007] The locking structure includes a locking component, a connecting component, a driving component, and a locking rod. The connecting component connects the locking component and the driving component at both ends. The driving component includes a first driving wheel, a second driving wheel, and a third driving wheel. The locking component drives the first driving wheel and the second driving wheel to rotate in opposite directions through the connecting component. The first driving wheel and the second driving wheel are both engaged with the third driving wheel. The third driving wheel is located outside the locking rod and is engaged with the locking rod to drive the locking rod to move horizontally. The locking rod has a needle rod at the end away from the manhole cover body.

[0008] The locking structure includes a fixed frame, a sealing frame, a limiting frame, and a plurality of clamping balls disposed within the limiting frame. The sealing frame is disposed outside the limiting frame, and the fixed frame is disposed outside the sealing frame. After the needle bar is inserted into the limiting frame, it is locked by pressing the clamping balls outward.

[0009] A magnetic block is used to attract and limit the movement towards the magnetic block, increasing the distance between adjacent holding balls and thus unlocking.

[0010] Preferably, the locking assembly includes a first handwheel and a second handwheel on the same vertical axis. The outer sides of the first handwheel and the second handwheel are provided with multiple locking blocks, and the outer sides of the locking blocks are provided with threads to increase the friction when the first handwheel and the second handwheel rotate.

[0011] Preferably, when the manhole cover is locked or unlocked, the rotation directions of handwheel one and handwheel two are opposite.

[0012] Preferably, the connecting assembly includes a connecting rod one and a connecting rod two, the connecting rod two is located outside the connecting rod one, and the two ends of the connecting rod one are respectively connected to a handwheel one and a drive wheel one, the two ends of the connecting rod two are respectively connected to a handwheel two and a drive wheel two, and the drive wheel three is perpendicularly located on one side of the drive wheel one and the drive wheel two.

[0013] Preferably, the locking rod includes a base block one, a threaded rod and a base block two, the threaded rod is located between the base block one and the base block two, and the drive wheel three is located outside the threaded rod and is engaged with the threaded rod.

[0014] Preferably, a U-shaped ring is provided on the outer side of the drive wheel three, and a sliding hole is provided in the middle of the U-shaped ring. The threaded rod passes through the drive wheel three and is slidably connected to the U-shaped ring. The two connecting rods are respectively connected to the opposite sides of the opening end of the U-shaped ring.

[0015] Preferably, the diameter of the end of the encapsulation frame near the locking mechanism is smaller than the diameter of the end away from the locking mechanism; the end of the limiting frame away from the locking mechanism is provided with a limiting groove, and a spring is provided in the limiting groove, with the other end of the spring fixedly connected to the end of the fixing frame away from the locking mechanism.

[0016] Preferably, the manhole cover base has a groove group located on both sides of the manhole cover body. The groove group includes a first groove, a second groove, and an L-shaped groove. The second groove and the L-shaped groove are located below the first groove and are connected. The locking component is located in the first groove, the driving component is located in the second groove, the locking rod is located at the connection between the second groove and the L-shaped groove, the fixing frame is fixedly located in the horizontal groove of the L-shaped groove, the magnetic block is located in the vertical groove of the L-shaped groove, and the first groove has a cabinet door with a door lock.

[0017] Based on the above-mentioned locking structure of the manhole cover, this application also proposes a locking method using the above-mentioned locking structure of the manhole cover, comprising the following steps:

[0018] S1. Before locking, unlock the door and open the cabinet door;

[0019] S2. When locking, rotate handwheel one and handwheel two in the opposite direction. Handwheel one drives drive wheel one to rotate through connecting rod one, and handwheel two drives drive wheel two to rotate through connecting rod two. Drive wheel one and drive wheel two drive drive wheel three to rotate. Drive wheel three drives the locking rod to move horizontally toward the locking structure, so that the needle rod is inserted between multiple clamping balls. The needle rod pushes the clamping balls to move radially within the limit frame. Under the limiting action of the sealing frame and spring, the manhole cover body is locked. After locking, the cabinet door is closed and locked.

[0020] S3. When unlocking, open the cabinet door and first place the magnetic block into the vertical groove of the L-shaped groove. The magnetic block attracts the limiting frame, which drives the clamping ball to squeeze the spring to move horizontally. As the diameter of the encapsulation frame gradually increases, the distance between the clamping balls increases, causing the pin bar to loosen and the locking structure and latching structure to separate.

[0021] S4. After the locking structure and the latching structure are separated, rotate handwheel one and handwheel two in the opposite direction. Through the connecting component, make the rotation direction of drive wheel one, drive wheel two and drive wheel three opposite to that in step S2. Drive wheel three drives the locking rod to move horizontally in the opposite direction until the needle rod disengages from the latching structure, so that the manhole cover body can be completely unlocked. When the manhole cover body is fully unlocked, the locking structures are connected on both sides.

[0022] The beneficial effects of this invention are:

[0023] 1. By rotating handwheel one and handwheel two in the opposite direction, the drive component is rotated through the connecting component. The drive component drives the locking rod to move horizontally and insert it between the clamping balls in the limit frame to achieve locking. The operation is convenient and the locking effect is good.

[0024] 2. When unlocking, the limit frame must first be attracted by the magnet. The limit frame moves the clamping ball, causing the needle rod to loosen. This is the initial unlocking. Continue to rotate handwheel one and handwheel two in the opposite direction to retract the locking rod into groove two, thus achieving complete unlocking of the manhole cover. The unlocking steps are restricted by sequence, and the rotation of the locking components is restricted by direction, which greatly improves the anti-theft performance. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a connection diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the locking mechanism connection of the present invention;

[0028] Figure 3 This is a schematic diagram of the locking structure connection of the present invention;

[0029] Figure 4 This is a schematic diagram of the locking structure connection of the present invention.

[0030] The markings in the diagram are as follows: 1. Manhole cover body, 11. Fixing block, 2. Manhole cover base, 21. Groove 1, 211. Cabinet door, 22. Groove 2, 23. L-shaped groove, 3. Locking mechanism, 4. Locking structure, 41. Locking component, 411. Handwheel 1, 412. Handwheel 2, 413. Locking block, 42. Connecting component, 421. Connecting rod 1, 422. Connecting rod 2, 43. Drive component, 431. Drive wheel 1, 432. Drive wheel 2, 433. Drive wheel 3, 44. Locking rod, 441. Bottom block 1, 442. Threaded rod, 443. Bottom block 2, 45. Needle rod, 46. U-shaped ring, 461. Sliding hole, 5. Locking structure, 51. Fixing frame, 52. Encapsulation frame, 53. Limiting frame, 531. Limiting groove, 54. Holding ball, 55. Spring, 6. Magnetic block. Detailed Implementation

[0031] Example 1

[0032] like Figure 1 As shown, this application proposes a locking structure for a manhole cover, including a manhole cover body 1 and a manhole cover base 2. Fixing blocks 11 are provided on both sides of the manhole cover body 1. The fixing blocks 11 are connected to a locking mechanism 3 and are inserted into the manhole cover base 2 via the locking mechanism 3.

[0033] like Figure 2 As shown, the locking mechanism 3 includes:

[0034] like Figure 3As shown, the locking structure 4 includes a locking component 41, a connecting component 42, a driving component 43, and a locking rod 44. The two ends of the connecting component 42 are respectively connected to the locking component 41 and the driving component 43. The driving component 43 includes a first driving wheel 431, a second driving wheel 432, and a third driving wheel 433. The locking component 41 drives the first driving wheel 431 and the second driving wheel 432 to rotate in opposite directions through the connecting component 42. The first driving wheel 431 and the second driving wheel 432 are both engaged with the third driving wheel 433. The third driving wheel 433 is located outside the locking rod 44 and is engaged with the locking rod 44, and is used to drive the locking rod 44 to move horizontally. The locking rod 44 has a needle rod 45 at the end away from the manhole cover body 1. The locking assembly 41 includes a first handwheel 411 and a second handwheel 412 on the same vertical axis. Multiple locking blocks 413 are provided on the outer sides of the first handwheel 411 and the second handwheel 412, and the locking blocks 413 are threaded to increase the friction when the first handwheel 411 and the second handwheel 412 rotate. When the manhole cover is locked or unlocked, the first handwheel 411 and the second handwheel 412 rotate in opposite directions and can only rotate in opposite directions. If the first handwheel 411 and the second handwheel 412 rotate in the same opposite direction, then the connecting assembly 42 makes the first drive wheel 431 and the second drive wheel 432 rotate in the same direction. This results in the driving forces on the third drive wheel 433 being opposite and canceling each other out, meaning the third drive wheel 433 cannot be driven to rotate, and only the first drive wheel 431 and the second drive wheel 432 will be damaged. The connecting assembly 42 includes a first connecting rod 421 and a second connecting rod 422. The second connecting rod 422 is located outside the first connecting rod 421, and the two ends of the first connecting rod 421 are respectively connected to a first handwheel 411 and a first drive wheel 431. The two ends of the second connecting rod 422 are respectively connected to a second handwheel 412 and a second drive wheel 432. The third drive wheel 433 is vertically located on one side of the first drive wheel 431 and the second drive wheel 432.

[0035] like Figure 4 As shown, the locking structure 5 includes a fixing frame 51, a sealing frame 52, a limiting frame 53, and a plurality of clamping balls 54 disposed within the limiting frame 53. The sealing frame 52 is disposed outside the limiting frame 53, and the fixing frame 51 is disposed outside the sealing frame 52. After the needle bar 45 is inserted into the limiting frame 53, it is locked by squeezing the clamping balls 54 outward.

[0036] like Figure 1-2 As shown, magnetic block 6 is used to attract and limit the movement towards magnetic block 6, increasing the distance between adjacent clamping balls 54, thereby achieving unlocking.

[0037] like Figure 1-4 As shown, based on the above-described locking structure for manhole covers, this application also proposes a locking method using the above-described locking structure for manhole covers, comprising the following steps:

[0038] S1. Before locking, unlock the door and open the cabinet door 211;

[0039] S2. When locking, rotate handwheel 1 411 and handwheel 2 412 in the opposite direction. Handwheel 1 411 drives drive wheel 1 431 to rotate through connecting rod 1 421. Handwheel 2 412 drives drive wheel 2 432 to rotate through connecting rod 2 422. Drive wheel 1 431 and drive wheel 2 432 drive drive wheel 3 433 to rotate. Drive wheel 3 433 drives locking rod 44 to move horizontally toward locking structure 5, so that needle rod 45 is inserted between multiple clamping balls 54. Needle rod 45 pushes clamping balls 54 to move radially within limit frame 53. Under the limiting action of encapsulation frame 52 and spring 55, the well cover body 1 is locked. After locking, close cabinet door 211 and lock.

[0040] S3. When unlocking, open cabinet door 211, first put magnetic block 6 into the vertical groove of L-shaped groove 23. Magnetic block 6 attracts limit frame 53 and drives clamping ball 54 to squeeze spring 55 to move horizontally. As the diameter of encapsulation frame 52 gradually increases, the distance between clamping balls 54 increases, causing needle bar 45 to loosen and the locking structure 4 and latching structure 5 to separate.

[0041] S4. After the locking structure 4 and the latching structure 5 are separated, the handwheel 1 411 and the handwheel 2 412 are rotated in the opposite direction. Through the connecting component 42, the rotation direction of the drive wheel 1 431, the drive wheel 2 432 and the drive wheel 3 433 is opposite to that in step S2. The drive wheel 3 433 drives the locking rod 44 to move horizontally in the opposite direction until the needle rod 45 is disengaged from the latching structure 5. This can achieve complete unlocking of the manhole cover body 1. When the manhole cover body 1 is fully unlocked, the locking structure 4 is connected on both sides. At the same time, the unlocking steps are restricted in sequence, and the rotation of the locking component 41 is restricted in direction, which greatly improves the anti-theft performance.

[0042] Example 2

[0043] The difference between this embodiment and Embodiment 1 is that:

[0044] like Figure 2-3 As shown, the locking lever 44 includes a base block 441, a threaded lever 442, and a base block 443. The threaded lever 442 is located between the base block 441 and the base block 443. The drive wheel 433 is located outside the threaded lever 442 and is engaged with the threaded lever 442, so that the drive wheel 433 can drive the needle bar 45 to move horizontally through the locking lever 44 to achieve locking.

[0045] like Figure 4 As shown, the diameter of the end of the encapsulation frame 52 near the locking mechanism is smaller than the diameter of the end away from the locking mechanism; the end of the limiting frame 53 away from the locking mechanism is provided with a limiting groove 531, and a spring 55 is provided in the limiting groove 531. The other end of the spring 55 is fixedly connected to the end of the fixing frame 51 away from the locking structure 4, so that when locked, the needle rod 45 is clamped by the combined cooperation of the spring 55, the clamping ball 54, the encapsulation frame 52 and the limiting frame 53, thereby locking the manhole cover body 1.

[0046] like Figure 1-2 As shown, a groove group is provided inside the manhole cover base 2 and on both sides of the manhole cover body 1. The groove group includes groove 1 21, groove 2 22 and L-shaped groove 23. Groove 2 22 and L-shaped groove 23 are located below groove 1 21 and are connected. Locking component 41 is located in groove 1 21, driving component 43 is located in groove 2 22, locking rod 44 is located at the connection between groove 2 22 and L-shaped groove 23, fixing frame 51 is fixedly located in the horizontal groove of L-shaped groove 23, magnetic block 6 is located in the vertical groove of L-shaped groove 23, and a cabinet door 211 is provided on groove 1 21, and a door lock is provided on cabinet door 211.

[0047] The other technical features and working principles of this embodiment are the same as those of Embodiment 1.

[0048] Example 3

[0049] like Figure 3 As shown, the difference between this embodiment and Embodiment Two is that: a U-shaped ring 46 is provided on the outer side of the drive wheel three 433 to fix the drive wheel three 433, ensuring that the drive wheel three 433 is always engaged with the drive wheel two 432 and the drive wheel one 431. A sliding hole 461 is provided in the middle of the U-shaped ring 46, and the threaded rod 442 passes through the drive wheel three 433 and is slidably connected to the U-shaped ring 46. Connecting rod two 422 and connecting rod one 421 are respectively connected to the opposite sides of the open end of the U-shaped ring 46 to strengthen the fixation of the U-shaped ring 46. Other technical features and working principles of this embodiment are the same as those of Embodiment Two.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A locking structure for a manhole cover, comprising a manhole cover body and a manhole cover base, wherein fixing blocks are provided on both sides of the manhole cover body, and the fixing blocks are connected to a locking mechanism and inserted into the manhole cover base through the locking mechanism, characterized in that: The locking mechanism includes: The locking structure includes a locking component, a connecting component, a driving component, and a locking rod. The connecting component connects the locking component and the driving component at both ends. The driving component includes a first driving wheel, a second driving wheel, and a third driving wheel. The locking component drives the first driving wheel and the second driving wheel to rotate in opposite directions through the connecting component. The first driving wheel and the second driving wheel are both engaged with the third driving wheel. The third driving wheel is located outside the locking rod and is engaged with the locking rod to drive the locking rod to move horizontally. The locking rod has a needle rod at the end away from the manhole cover body. The locking structure includes a fixed frame, a sealing frame, a limiting frame, and multiple clamping balls disposed within the limiting frame. The sealing frame is located outside the limiting frame, and the fixed frame is located outside the sealing frame. After the needle rod is inserted into the limiting frame, it is locked by pressing the clamping balls outward. The diameter of the sealing frame at the end near the locking structure is smaller than the diameter at the end away from the locking structure. The limiting frame at the end away from the locking structure has a limiting groove, and a spring is disposed in the limiting groove. The other end of the spring is fixedly connected to the end of the fixed frame away from the locking structure, so that when locked, the needle rod is clamped by the combined action of the spring, clamping balls, sealing frame, and limiting frame, thereby locking the manhole cover body. A magnetic block is used to attract the limiting frame to move towards the magnetic block, increasing the distance between adjacent holding balls and thus unlocking.

2. The locking structure for the manhole cover according to claim 1, characterized in that: The locking assembly includes a first handwheel and a second handwheel on the same vertical axis. The outer sides of the first handwheel and the second handwheel are provided with multiple locking blocks, and the outer sides of the locking blocks are provided with threads to increase the friction when the first handwheel and the second handwheel rotate.

3. The locking structure for the manhole cover according to claim 2, characterized in that: When the manhole cover is locked or unlocked, the rotation directions of handwheel one and handwheel two are opposite.

4. The locking structure for the manhole cover according to claim 2, characterized in that: The connecting assembly includes a connecting rod one and a connecting rod two. The connecting rod two is located outside the connecting rod one, and the two ends of the connecting rod one are respectively connected to a handwheel one and a drive wheel one. The two ends of the connecting rod two are respectively connected to a handwheel two and a drive wheel two. The drive wheel three is perpendicularly located on one side of the drive wheel one and the drive wheel two.

5. The locking structure for the manhole cover according to claim 4, characterized in that: The locking rod includes a base block one, a threaded rod and a base block two. The threaded rod is located between the base block one and the base block two. The drive wheel three is located outside the threaded rod and is engaged with the threaded rod.

6. The locking structure for the manhole cover according to claim 5, characterized in that: The drive wheel three is provided with a U-shaped ring on its outer side, and a sliding hole is provided in the middle of the U-shaped ring. The threaded rod passes through the drive wheel three and is slidably connected to the U-shaped ring. The two connecting rods are respectively connected to the opposite sides of the opening end of the U-shaped ring.

7. The locking structure for the manhole cover according to claim 6, characterized in that: The manhole cover base is provided with a groove group on both sides of the manhole cover body. The groove group includes groove one, groove two and L-shaped groove. Groove two and L-shaped groove are located below groove one and are connected. The locking component is located in groove one, the driving component is located in groove two, the locking rod is located at the connection between groove two and L-shaped groove, the fixing frame is fixed in the horizontal groove of L-shaped groove, the magnetic block is located in the vertical groove of L-shaped groove, and a cabinet door is provided on groove one, and the cabinet door is provided with a door lock.

8. A locking method using the locking structure of the manhole cover as described in claim 7, characterized in that: Includes the following steps: S1. Before locking, unlock the door and open the cabinet door; S2. When locking, rotate handwheel one and handwheel two in the opposite direction. Handwheel one drives drive wheel one to rotate through connecting rod one, and handwheel two drives drive wheel two to rotate through connecting rod two. Drive wheel one and drive wheel two drive drive wheel three to rotate. Drive wheel three drives the locking rod to move horizontally toward the locking structure, so that the needle rod is inserted between multiple clamping balls. The needle rod pushes the clamping balls to move radially within the limit frame. Under the limiting action of the sealing frame and spring, the manhole cover body is locked. After locking, the cabinet door is closed and locked. S3. When unlocking, open the cabinet door and first place the magnetic block into the vertical groove of the L-shaped groove. The magnetic block attracts the limiting frame, which drives the clamping ball to squeeze the spring to move horizontally. As the diameter of the encapsulation frame gradually increases, the distance between the clamping balls increases, causing the pin bar to loosen and the locking structure and latching structure to separate. S4. After the locking structure and the latching structure are separated, rotate handwheel one and handwheel two in the opposite direction. Through the connecting component, make the rotation direction of drive wheel one, drive wheel two and drive wheel three opposite to that in step S2. Drive wheel three drives the locking rod to move horizontally in the opposite direction until the needle rod disengages from the latching structure, so that the manhole cover body can be completely unlocked. When the manhole cover body is fully unlocked, the locking structures are connected on both sides.

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