Hinged well lid lock

Abstract

The utility model relates to a kind of hinged well lid lock, aiming at solving the problem that the structure of existing similar products is relatively single, and the combination mode of motor, steel ball, locking pin is less used.The first lock body of the well lid lock is provided with lock shaft extended by spring in one side shaft cavity, the motor cavity in the other side of first lock body is provided with motor encapsulated in motor cavity by partition, the transmission shaft of motor is provided with shaft sleeve, the steel ball at the second steel ball hole of lock shaft side is abutted by the first steel ball hole of partition and the shaft sleeve through the partition, the first steel ball hole of partition and the second steel ball hole of lock shaft are aligned respectively with the two sides of steel ball, the shaft is provided with connecting shaft outside diameter on the other side of first lock body symmetrically with the extension end of lock shaft, the connecting shaft is hingedly fixed to the outside diameter of first lock body by pin shaft at one end, the other end of connecting shaft is connected with rotating piece by connecting plate, the spring of cover and the shell mouth on the side of lock shaft are slidably connected with the slide groove on the two sides of slide plate fixed to bottom shell, and the slide plate is fixedly arranged on the bottom side of cover body by bottom shell.

Description

Technical Field

[0001] This utility model relates to a manhole cover lock, specifically a hinged manhole cover lock. Background Technology

[0002] Manhole covers are used in cities to seal the openings of underground pipelines (such as sewage, rainwater, water supply, electricity, communication, and gas pipelines). They cover the manholes of these pipelines, with an exit point leading to the surface at regular intervals. Manhole covers are typically made of reinforced concrete, metal, or reinforced plastics, and are primarily round or square in shape. For safety, especially for manhole covers used to lay fiber optic cables, locks are usually installed. Currently, there are two main types of manhole cover locks on the market: 1. Purely mechanical locks, opened with a mechanical key; 2. Electronic locks, controlled by NB-IoT. Meanwhile, besides the removable type, another major type of existing manhole cover is the hinged (flip-type), which generally uses a double or triple linkage to achieve locking. For example, Chinese patent application number 202010776871.8, application announcement date 2020.10.13, invention title "A manhole cover lock assembly, manhole cover lock and manhole cover"; another example is Chinese patent application number 201920363600.2, authorization announcement date 2020.02.11, utility model title "A three-bar manhole cover lock"; the lock body structure design and usage of the above products and similar products are relatively simple, and rarely use the combination of motor, steel ball and locking pin. Summary of the Invention

[0003] To overcome the above shortcomings, the purpose of this utility model is to provide a hinged manhole cover lock that solves the technical problem that existing similar products have relatively simple lock body structure design and usage methods, and rarely use a combination of motor, steel ball, and locking pin. This objective is achieved through the following technical solution.

[0004] A hinged manhole cover lock has a cover body located in a stepped groove at the top of a cylinder. One end of the cover body is hinged to one end of the lower cylinder. The cover body at the hinge is locked to an inner locking position on the inner diameter of the cylinder by a main lock head extending from at least one lock body at the bottom of the other symmetrical end. The inner locking position is a protruding side lug on the inner diameter of the cylinder below the cover body. The inner diameter of the cylinder below the cover body has an inner locking position with a diameter smaller than the upper and lower inner diameters of the cylinder. A rotating component is provided in the middle of the cover body, penetrating the cover body and extending to the bottom. An emergency unlocking hole is provided at the center of the rotating component. One end of a connecting plate is hinged to one side of the edge of the rotating rib, and the other end of the connecting plate is hinged to the lock shell of the lock body on the other symmetrical side of the main lock head. The key structural design features a first lock body, whose housing includes a cover and a bottom shell. A lock shaft extending from one side of the first lock body is housed in a spring-loaded cavity. A motor, enclosed within a partition, is located in a motor cavity on the other side of the first lock body. The motor's drive shaft is fitted with a bushing. This bushing abuts against a steel ball at a second steel ball hole on one side of the lock shaft via a first steel ball hole in the partition. The steel ball is confined between the first steel ball hole in the partition and the second steel ball hole on the lock shaft. The two sides of the steel ball are aligned with the first steel ball hole in the partition and the second steel ball hole in the lock shaft, respectively. The extended ends of the lock shaft are symmetrical. On the other side, the outer diameter of the first lock body is provided with a connecting shaft. One end of the connecting shaft is hinged to the outer diameter of the first lock body by a pin. The other end of the connecting shaft is connected to the rotating part through a connecting plate. The spring of the cover and the shell opening on one side of the lock shaft are slidably connected to the sliding grooves on both sides of the slide plate fixed to the bottom shell. The slide plate is fixedly set on the bottom side of the cover through the bottom shell. The lock shaft of the first lock body is the main lock head of the lock body. The slide plate is provided with a circuit board. The circuit board is provided with a wireless sensing module and a battery. The motor is connected to the circuit board through a line. Alternatively, the lower manual hole on the lock shaft side of the cover is aligned with the upper manual hole of the cover.

[0005] The pins of the first lock body extend from the hinged fixing positions on the outer diameter of the two side covers respectively, and are inserted into the guide grooves on both sides of the bottom of the lock-groove type manhole cover. The first lock body is set in the mounting groove between the guide grooves on both sides of the bottom of the lock-groove type manhole cover.

[0006] The shaft cavity and motor cavity of the first lock body are arranged vertically. The pin of the first lock body has a pin head with symmetrical bevels on both sides of the end. The two sides of the end of the first lock tongue are triangular.

[0007] The first lock body has a first sealing bushing at one end of the lock shaft protruding from the end cover, and a second sealing bushing at the other end of the lock shaft on the spring side inside the first lock body, with the spring abutting against the outer diameter of the lock shaft protruding from the second sealing bushing.

[0008] The lock body is a second lock body. The shaft cavity and motor cavity inside the second lock body are arranged left and right. The bushing is replaced by a kit. The drive shaft of the motor is inserted into the spiral hole of the kit through a pin. The kit abuts against the steel ball at the second steel ball hole on one side of the lock shaft through the first steel ball hole of the partition. The end of the lock shaft extending out of the second lock body is provided with a hinged swinging first lock tongue. The second lock body at the other end of the first lock tongue is provided with a fixed and extending plate. The plate is connected to the rotating part through a connecting plate.

[0009] The outer diameter of the second lock body has four symmetrical pillars in pairs. The opening on one side of the lock case covers the outer diameter of the second lock body and is fixed by screws on the pillars.

[0010] The second lock body contains a steel ball or a steel ball sleeve disposed on the outer diameter of the lock shaft inside the second lock body. The second steel ball hole and the steel ball encapsulation on one side of the lock shaft are disposed inside the steel ball sleeve.

[0011] The first latch of the second lock body may be replaced by the second latch. The two sides of the end of the second latch are shovel-shaped. The diameter of the end of the second latch at the lock shaft is larger than the diameter of the end of the first latch at the lock shaft, and the opening is provided with symmetrical corner grooves on both sides of the opening.

[0012] The lock bodies are arranged symmetrically on both sides of the hinge between the cover and the cylinder, or arranged at three equal angles on both sides of the hinge between the cover and the cylinder.

[0013] The cover is replaced with a removable cover, and the cylinder is replaced with a removable cylinder. The removable cover is inserted into the top opening of the removable cylinder and positioned within the stepped groove at the top opening of the removable cylinder. A lock body at the bottom of the removable cover is locked to an inner locking position within the inner diameter of the removable cylinder by a main lock head extending from the lock body. The inner diameter of the removable cylinder below the removable cover has an inner locking position with a diameter smaller than the upper and lower inner diameters of the removable cylinder. The above is an embodiment of the lock body structure in the removable manhole cover lock.

[0014] This utility model has a reasonable structural design, is easy to use and install, and has a variety of lock body structures. In particular, its lock body is equipped with a linkage and interlocking structure design that combines a motor, steel balls, and locking pins. It is suitable for use as a hinged manhole cover lock and for structural improvements of similar products. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the bottom structure of Embodiment 1 of this utility model.

[0016] Figure 2 yes Figure 1 A cross-sectional view of the hinged joint between the cover and the cylinder.

[0017] Figure 3 yes Figure 1A schematic diagram of the rear view structure.

[0018] Figure 4 yes Figure 2 Enlarged cross-sectional view of the first lock body.

[0019] Figure 5 yes Figure 4 A schematic diagram of the three-dimensional structure.

[0020] Figure 6 yes Figure 5 A partial diagram of the exploded structure.

[0021] Figure 7 This is a schematic diagram of the bottom structure of Embodiment 2 of this utility model.

[0022] Figure 8 yes Figure 7 A cross-sectional view of the hinge position is shown in the figure, with part A framed in the figure.

[0023] Figure 9 yes Figure 8 Enlarged view of part A.

[0024] Figure 10 yes Figure 7 A schematic diagram of the three-dimensional structure.

[0025] Figure 11 This is a schematic diagram of the bottom structure of Embodiment 3 of this utility model.

[0026] Figure 12 yes Figure 11 A cross-sectional view of the hinge position is shown in the figure, with part B framed in the figure.

[0027] Figure 13 yes Figure 12 Enlarged view of part B.

[0028] Figure 14 yes Figure 12 A schematic diagram of the three-dimensional structure of part B, omitting the lock case in the diagram.

[0029] Figure 15 This is a schematic diagram of the bottom structure of Embodiment 4 of this utility model.

[0030] Figure 16 yes Figure 15 A schematic diagram of the lock body in the open state.

[0031] Figure 17 This is a cross-sectional structural diagram of the first embodiment of this utility model in use with a removable manhole cover lock.

[0032] Attached figures and their names: 1. Cover, 2. Cylinder, 201. Side lug, 3. First lock body, 301. Motor, 302. Cover, 303. Bushing, 304. Partition, 305. Locking shaft, 306. Bottom shell, 307. Slide plate, 308. Spring, 309. Connecting shaft, 310. Pin, 311. Steel ball, 4. Rotating component, 5. Connecting plate, 6. Lock slot type manhole cover, 601. Guide groove, 7. Second lock body, 8. Kit, 9. First locking tongue, 10. Plate, 11. Column, 12. Steel ball sleeve, 13. Second locking tongue, 14. Removable cover, 15. Removable cylinder. Implementation

[0033] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-6 In the first embodiment shown, the cover 1 of the manhole cover lock is located in the stepped groove at the top of the cylinder 2. At the same time, one end of the cover is hinged to one end of the lower cylinder. The cover at the hinge is locked to the inner locking position of the inner diameter of the cylinder by the main lock head extending from the lock body at the bottom of the other symmetrical end. The inner locking position is a raised side lug 201 at the inner diameter of the cylinder below the cover. The inner diameter of the cylinder below the cover has an inner locking position with a diameter smaller than the upper and lower inner diameters of the cylinder. The middle of the cover has a rotating part 4 that penetrates the cover and extends to the bottom. The center of the rotating part has an emergency unlocking hole. One end of the connecting plate 5 is hinged to one side of the edge of the rotating rib, and the other end of the connecting plate is hinged to the lock body of the lock body on the other symmetrical side of the main lock head. The aforementioned lock body is the first lock body 3. The lock shell of the first lock body includes a cover 302 and a bottom shell 306. A lock shaft 305 extending through a spring 308 is provided in the shaft cavity on one side of the first lock body. A motor 301 encapsulated within the motor cavity by a partition 304 is provided in the motor cavity on the other side of the first lock body. The drive shaft of the motor is provided with a bushing 303. The bushing abuts against a steel ball 311 at a second steel ball hole on one side of the lock shaft through a first steel ball hole in the partition. The steel ball is limited to moving between the first steel ball hole in the partition and the second steel ball hole on the lock shaft. The two sides of the steel ball respectively abut against the first steel ball hole in the partition and the second steel ball hole on the lock shaft. The second steel ball holes of the lock shaft are aligned. The protruding end of the lock shaft is symmetrically provided with a connecting shaft 309 on the outer diameter of the first lock body. One end of the connecting shaft is hinged to the outer diameter of the first lock body through a pin 310. The other end of the connecting shaft is connected to the rotating part through a connecting plate. The spring of the cover and the shell opening on one side of the lock shaft are slidably connected to the sliding grooves on both sides of the sliding plate 307 fixed to the bottom shell. The sliding plate is fixedly set on the bottom side of the cover through the bottom shell. The lock shaft of the first lock body is the main lock head of the lock body. A circuit board is provided inside the sliding plate. The circuit board is provided with a wireless sensing module and a battery. The motor is connected to the circuit board through a line.

[0034] like Figures 7-10In the second embodiment shown, the lock bodies are respectively arranged symmetrically on both sides of the hinge joint between the cover and the cylinder. The pins of the first lock body extend from the hinge fixing positions of the outer diameter of the two side covers and are inserted into the guide grooves 601 on both sides of the bottom of the lock slot type manhole cover 6. The first lock body is set in the mounting groove in the middle of the guide grooves on both sides of the bottom of the lock slot type manhole cover.

[0035] In the first and second embodiments described above, the inner shaft cavity and motor cavity of the first lock body are arranged vertically. The pin of the first lock body has a pin head with symmetrical bevels on both sides of the end. The two sides of the end of the first lock tongue are triangular. A first sealing bushing is provided at one end of the lock shaft of the first lock body and a second sealing bushing is provided at the other end of the lock shaft on the side of the spring in the first lock body. The spring abuts against the outer diameter of the lock shaft extending from the second sealing bushing.

[0036] like Figures 11-14 In the third embodiment shown, the lock body is a second lock body 7. The shaft cavity and motor cavity inside the second lock body are arranged left and right. The bushing is replaced by a kit 8. The drive shaft of the motor is inserted into the spiral hole of the kit through a pin. The kit abuts against the steel ball at the second steel ball hole on one side of the lock shaft through the first steel ball hole of the partition plate. The end of the lock shaft extending out of the second lock body is provided with a hinged and swinging first lock tongue 9. The second lock body at the other symmetrical end of the first lock tongue is provided with a fixed and extending plate 10. The plate is connected to the rotating part through a connecting plate. The outer diameter of the second lock body is provided with four symmetrically arranged column parts 11. The opening on one side of the lock shell covers the outer diameter of the second lock body and is fixed by screws on the column parts.

[0037] like Figures 15-16 In the fourth embodiment shown, the lock bodies are respectively arranged at three equal angles on both sides of the hinge between the cover and the cylinder. The second lock body contains steel balls or a steel ball sleeve 12 located on the outer diameter of the lock shaft. A second steel ball hole and a steel ball encapsulation are located on one side of the lock shaft within the steel ball sleeve. The first latch of the second lock body can be replaced by a second latch 13. The two sides of the end of the second latch are shovel-shaped. The diameter of the second latch's lock shaft end is larger than that of the first latch's lock shaft end, and symmetrical corner grooves are provided on both sides of the opening.

[0038] like Figure 17 As shown, in the above embodiments one to four, the cover is replaced with a pick-and-place cover 14, and the cylinder is replaced with a pick-and-place cylinder 15. The pick-and-place cover is inserted from the top opening of the pick-and-place cylinder and is positioned in the stepped groove at the top opening of the pick-and-place cylinder. The lock body at the bottom of the pick-and-place cover is locked to the inner locking position of the inner diameter of the pick-and-place cylinder by the main lock head extending from the lock body. The inner diameter of the pick-and-place cylinder below the pick-and-place cover is provided with an inner locking position with a diameter smaller than the upper and lower inner diameters of the pick-and-place cylinder.

[0039] In Examples 1 and 2, when the electronic key approaches the lock body of the manhole cover, the motor unlocks and retracts the bushing from the first ball bearing hole in the partition, loosening the ball bearing. At this point, pulling the cover opens the manhole cover. When the cover is closed, and the electronic key approaches the lock body, the motor locks and extends the bushing from the first ball bearing hole in the partition, pressing the ball bearing into the second ball bearing hole of the lock shaft. At this point, the lock shaft cannot move due to the ball bearing's limitation. In Examples 3 and 4, when the electronic key approaches the lock body of the manhole cover, the motor unlocks and retracts the bushing from the first ball bearing hole in the partition, loosening the ball bearing. At this point, pulling the cover opens the manhole cover. When the cover is closed, and the electronic key approaches the lock body, the motor locks and extends the bushing from the first ball bearing hole in the partition, pressing the ball bearing into the second ball bearing hole of the lock shaft. At this point, the lock shaft cannot move due to the ball bearing's limitation. Meanwhile, in Embodiments 3 and 4, the lock is indirectly locked to the side lug of the cylinder by means of the first or second locking tongue at the end of the lock shaft, while in Embodiments 1 and 2, the lock is directly locked to the side lug of the cylinder by means of the end of the lock shaft.

[0040] The above embodiments one to four retain the emergency unlocking method at the emergency unlocking hole at the center of the cover. The lock body is pulled back to the center using the connecting rod, thereby achieving emergency unlocking. Alternatively, the lower manual hole on the lock shaft side below the cover can be aligned with the upper manual hole on the upper cover. A mechanical key or tool can be inserted through the upper manual hole of the cover into the lower manual hole on the lock shaft side below the cover, and the mechanical key or tool can move the lock shaft to achieve another method of emergency unlocking.

Claims

1. A hinged manhole cover lock, wherein the cover body (1) is disposed in the stepped groove at the top of the cylinder (2), and one end of the cover body is hinged to one end of the lower cylinder. The cover body at the hinge is locked to the inner locking position of the inner diameter of the cylinder by limiting and locking one end of the main lock head extending from the lock shell at at least one lock body at the bottom of the other symmetrical end. The inner locking position is a raised side lug (201) at the inner diameter of the cylinder below the cover body. The inner diameter of the cylinder below the cover body is provided with an inner locking position with a diameter smaller than the upper and lower inner diameters of the cylinder. A rotating part (4) is provided in the middle of the cover body, penetrating the cover body and extending to the bottom. An emergency unlocking hole is provided at the center of the rotating part. One end of the connecting plate (5) is hinged to one side of the edge of the rotating rib, and the other end of the connecting plate is hinged to the lock shell of the lock body on the other symmetrical side of the main lock head. The lock body is a first lock body (3). The lock shell of the first lock body includes a cover (302) and a bottom shell (306). A lock shaft (305) extending through a spring (308) is provided in the shaft cavity on one side of the first lock body. A motor (301) encapsulated in the motor cavity through a partition (304) is provided in the motor cavity on the other side of the first lock body. The drive shaft of the motor is provided with a bushing (303). The bushing abuts against a steel ball (311) at the second steel ball hole on one side of the lock shaft through the first steel ball hole of the partition. The steel ball is limited to moving between the first steel ball hole of the partition and the second steel ball hole on one side of the lock shaft. The two sides of the steel ball are aligned with the first steel ball hole of the partition and the second steel ball hole of the lock shaft, respectively. The outer diameter of the first lock body is provided with a connecting shaft (309) on the other side of the symmetrical protruding end. One end of the connecting shaft is hinged to the outer diameter of the first lock body through a pin (310). The other end of the connecting shaft is connected to the rotating part (4) through a connecting plate (5). The spring of the cover and the shell opening on one side of the lock shaft are slidably connected to the sliding grooves on both sides of the slide plate (307) fixed to the bottom shell. The slide plate is fixedly set on the bottom side of the cover (1) through the bottom shell. The lock shaft of the first lock body is the main lock head of the lock body. The slide plate is provided with a circuit board. The circuit board is provided with a wireless sensing module and a battery. The motor is connected to the circuit board through a line. At the same time, or the lower manual hole on the side of the lock shaft below the cover is aligned with the upper manual hole of the upper cover.

2. The hinged manhole cover lock according to claim 1, characterized in that... The pins (310) of the first lock body (3) extend out of the hinged fixing positions of the outer diameter of the two side covers (302) respectively, and are inserted into the guide grooves (601) set on both sides of the bottom of the lock slot type manhole cover (6). The first lock body is set in the installation groove in the middle of the guide grooves on both sides of the bottom of the lock slot type manhole cover.

3. The hinged manhole cover lock according to claim 1, characterized in that... The shaft cavity and motor cavity in the first lock body (3) are arranged vertically. The pin (310) of the first lock body is a pin head with symmetrical inclined surfaces on both sides of the end. The two sides of the end of the first lock tongue are triangular.

4. The hinged manhole cover lock according to claim 1, characterized in that... The first lock body (3) has a first sealing bushing at one end of the lock shaft (305) extending out of the end cover (302), and a second sealing bushing at the other end of the lock shaft on the side of the spring (308) inside the first lock body. The spring abuts against the outer diameter of the lock shaft extending out of the second sealing bushing.

5. The hinged manhole cover lock according to claim 1, characterized in that... The lock body is a second lock body (7). The shaft cavity and motor cavity inside the second lock body are arranged left and right. The bushing (303) is replaced by a kit (8). The drive shaft of the motor (301) is inserted into the spiral hole of the kit through a pin. The kit abuts against the steel ball (311) at the second steel ball hole on one side of the lock shaft (305) through the first steel ball hole of the partition plate (304). The end of the lock shaft extending out of the second lock body is provided with a hinged swinging first lock tongue (9). The second lock body at the other end of the first lock tongue is provided with a fixed and extending plate (10). The plate is connected to the rotating part (4) through the connecting plate (5).

6. The hinged manhole cover lock according to claim 5, characterized in that... The outer diameter of the second lock body (7) is provided with four symmetrical pillars (11). The opening on one side of the lock case covers the outer diameter of the second lock body and is fixed by screws on the pillars.

7. The hinged manhole cover lock according to claim 5, characterized in that... The second lock body (7) contains a steel ball (311) or a steel ball sleeve (12) located on the outer diameter of the lock shaft (305) inside the second lock body. The second steel ball hole and the steel ball encapsulation on one side of the lock shaft are located inside the steel ball sleeve.

8. The hinged manhole cover lock according to claim 5, characterized in that... The first latch (9) of the second lock body (7) can be replaced by the second latch (13). The two sides of the end of the second latch are shovel-shaped. The end diameter of the second latch at the lock shaft (305) is larger than the end diameter of the first latch at the lock shaft. The opening is provided with symmetrical corner grooves on both sides.

9. The hinged manhole cover lock according to claim 1, characterized in that... The lock bodies are respectively arranged in two symmetrical positions on both sides of the hinge between the cover (1) and the cylinder (2), or respectively arranged in three equal angles on both sides of the hinge between the cover and the cylinder.

10. The hinged manhole cover lock according to any one of claims 1-9, characterized in that... The cover (1) is replaced with a pick-and-place cover (14), and the cylinder (2) is replaced with a pick-and-place cylinder (15). The pick-and-place cover is inserted from the top opening of the pick-and-place cylinder and is positioned in the stepped groove at the top opening of the pick-and-place cylinder. The lock body at the bottom of the pick-and-place cover is locked to the inner locking position of the inner diameter of the pick-and-place cylinder by the main lock head extending from the lock body. The inner diameter of the pick-and-place cylinder below the pick-and-place cover is provided with an inner locking position with a diameter smaller than the upper and lower inner diameters of the pick-and-place cylinder.

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