Electronic manhole cover lock

Abstract

The present invention relates to the field of locks, and in particular to an electronic manhole cover lock. The present invention includes a lock body and a lock bolt, and the lock body includes a lock body box, a generator, a storage element, a control panel, a clutch latch, a clutch latch compression spring, a clutch sleeve, a clutch push pin, a screw spring, a spring screw motor, a clutch seat and a transmission rod. During implementation, the transmission rod can be rotated by an external force to drive the generator to generate electricity, and the storage element (such as a super capacitor) is charged through the rectifier element on the control panel. When charged to a certain voltage, the control panel will enter a working state, and the external force rotation and power generation can be stopped at this time. The stored electric energy is sufficient to allow the lock to work for a period of time. When the built-in battery is insufficient, there is no need to replace the battery, and even when the battery is not installed, there is no need for an external power supply to charge, and normal unlocking can be achieved. In addition, the switch lock mechanism of the present invention adopts a clutch control mechanism, which is simple and reliable in structure.

Description

Technical Field

[0001] The invention relates to the field of locks, in particular to an electronic manhole cover lock. Background Art

[0002] Ordinary manhole cover electronic locks are usually equipped with batteries or external power supply. The lock is put into working state through a switch or other means, and then the lock is opened after sending an unlock command through the communication interface of the manhole cover electronic lock (such as Bluetooth). The method of configuring batteries or external power supply has several disadvantages: 1. The battery working time is short, and the battery will be exhausted due to its own weak leakage after a longer time. The manhole cover electronic lock is installed outdoors, which has extremely high requirements for battery performance; 2. In some occasions, it is troublesome to replace or charge the battery; 3. The manhole cover electronic lock is installed outdoors, the conditions are poor, and the interface is easily damaged. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an electronic manhole cover lock with a simple and reliable structure. When the power of the built-in battery is low, it can be used normally without replacing the battery or having an external power supply, and can even be used without a battery or an external power supply.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an electronic manhole cover lock, including a lock body and a lock bolt, the lock body including a lock body box, a generator, a storage element, a control panel, a clutch pin, a clutch pin compression spring, a clutch sleeve, a clutch push pin, a screw spring, a spring screw motor, a clutch seat and a transmission rod.

[0005] The clutch seat is fixedly arranged in the lock body box, and the transmission rod, clutch sleeve and clutch seat are concentrically installed from the inside to the outside in sequence. The transmission rod and the transmission rod sleeve hole in the middle of the clutch sleeve form a rotational fit, and the clutch sleeve and the sleeve hole in the middle of the clutch seat form a rotational fit; the transmission rod is transmission-connected to the input shaft of the generator; a clutch hole is arranged on the rotational fit surface of the transmission rod and the clutch sleeve.

[0006] An assembly hole is provided on the side of the clutch seat, and its axis is radially arranged along the sleeve hole in the middle of the clutch seat. In the radial direction from the outside of the clutch seat to the center of the clutch seat, the assembly hole includes a spring screw motor hole, a spring screw hole and a clutch push pin hole in sequence. A screw spring groove is provided on the side wall of the spring screw hole, and the screw spring groove is a strip groove arranged axially along the spring screw hole.

[0007] The output shaft of the spring screw motor is threadedly connected with a screw shaft, a screw pin is arranged radially of the screw shaft, the screw spring is sleeved on the screw shaft, and tentacles extend from both ends of the screw spring; the spring screw motor is installed in the spring screw motor hole, the screw shaft and the screw spring are arranged in the spring screw hole, and the tentacles at both ends of the screw spring are inserted into the screw spring grooves.

[0008] The diameter of the clutch push pin hole is smaller than the diameter of the spring screw rod hole. The clutch push pin is installed in the clutch push pin hole. The clutch push pin is a T-pin. The large end of the clutch push pin is located in the spring screw rod hole, which can ensure that the small end of the clutch push pin does not exceed the end face of the clutch push pin hole close to the center of the clutch sleeve.

[0009] A clutch bayonet hole is provided on the side of the clutch sleeve, and its axis is radially arranged along the transmission rod sleeve hole in the middle of the clutch sleeve. The clutch bayonet is inserted in the clutch bayonet hole and can move axially along the clutch bayonet hole. The clutch bayonet hole is a stepped hole, and the small diameter end of the clutch bayonet hole is located at an end close to the center of the clutch sleeve.

[0010] A bayonet pin boss is arranged in the middle of the clutch bayonet pin, one end of the clutch bayonet pin close to the center of the clutch sleeve is a bayonet pin rod, and the other end is a bayonet pin transmission rod; the outer diameter specification of the bayonet pin boss is larger than the diameter of the small diameter end of the clutch bayonet pin hole, and smaller than the diameter of the large diameter end of the clutch bayonet pin hole; the diameter of the bayonet pin transmission rod is smaller than the diameter of the clutch push pin hole, and the outer diameter specification of the bayonet pin boss is larger than the diameter of the clutch push pin hole.

[0011] The clutch bayonet compression spring is sleeved on the bayonet rod, one end of the clutch bayonet compression spring is connected to the step surface of the clutch bayonet hole, and the other end is connected to the bayonet boss; when the transmission rod rotates to a position where the clutch hole and the clutch bayonet hole are coaxial, and the clutch bayonet moves toward the center of the clutch sleeve, the bayonet rod of the clutch bayonet can be inserted into the clutch hole on the transmission rod, and the bayonet transmission rod is disengaged from the clutch push pin hole on the clutch seat.

[0012] When the clutch sleeve rotates to a position where the clutch bayonet hole and the clutch push pin hole are coaxial, the clutch bayonet compression spring can move the bayonet boss on the clutch bayonet to the interface between the clutch seat and the clutch sleeve in a free state, and insert the bayonet transmission rod of the clutch bayonet into the clutch push pin hole on the clutch seat, and the bayonet rod disengages from the clutch hole on the transmission rod.

[0013] The elasticity K coefficient of the screw rod spring is greater than the elasticity K coefficient of the clutch bayonet pin compression spring.

[0014] The lock bolt includes a lock bolt lock rod and a lock bolt seat. The lock bolt lock rod is slidably installed on the lock bolt seat. A lock plate is fixedly connected to the clutch sleeve. The lock plate and the lock bolt lock rod are connected by a transmission mechanism. When the lock plate rotates with the clutch sleeve, it can drive the lock bolt lock rod to slide on the lock bolt seat.

[0015] The generator, the storage element and the spring lead screw motor are all electrically connected to the control board.

[0016] Furthermore, a limit slot is arranged on the rotating mating surface of the clutch seat and the clutch sleeve, one side wall of the limit slot is a closing limit and the other side wall is an opening limit, and a limit pin is fixedly arranged on the rotating mating surface of the clutch sleeve and the clutch seat, and the limit pin is inserted into the limit slot on the clutch seat.

[0017] Furthermore, the clutch seat is provided with a locking groove on the rotating mating surface with the clutch sleeve, and the clutch sleeve is provided with a clutch sleeve locking hole on the rotating mating surface with the clutch seat. A locking spring and a locking marble are installed in the clutch sleeve locking hole. When the lock is in the closing position and the unlocking position, the outer end of the locking marble is locked in the locking groove on the clutch seat.

[0018] Furthermore, the number of the clutch sleeve locking holes is two, and the number of the locking slots is four.

[0019] Furthermore, a power generation transmission gear is sleeved on the middle part of the transmission rod, and the two can rotate synchronously together, and the power generation transmission gear and the input shaft of the generator form a gear transmission connection structure.

[0020] Furthermore, one end of the transmission rod is sleeved in the clutch sleeve, and the other end is connected to a crank via the transmission sleeve, and the transmission sleeve and the crank can rotate synchronously with the transmission rod.

[0021] Furthermore, the lock body box is equipped with a lock cover plate, and the two are fixedly connected by lock body cover mounting screws; the lock cover plate is provided with an assembly hole for the lock body fixing screws to pass through; the generator, the storage element and the control board are fixedly arranged inside the lock body box.

[0022] Furthermore, the end of the clutch sleeve has a protruding threaded rod, the threaded rod is coaxially arranged with the clutch sleeve, the locking plate has an assembly hole for the threaded rod to pass through, and the locking plate is fixed to the clutch sleeve by a locking plate fixing nut; the locking plate has symmetrically arranged drive plates on both sides, and each drive plate is connected to a lock bolt.

[0023] Furthermore, the unlocking piece and the locking bolt and locking rod are connected via a connecting rod mechanism.

[0024] Furthermore, the unlocking piece and the lock bolt rod are connected by a steel rope loop, which includes a steel wire rope and a rope loop, and the rope loop is arranged on the outside of the steel wire rope so that the steel wire rope can slide axially in the rope loop; the length of the steel wire rope is greater than the length of the rope loop, so that both ends of the steel wire rope extend out of the rope loop, one end of the steel wire rope is fixedly connected to the lock bolt rod, and the other end is fixedly connected to the steel wire rope hinge piece; the steel wire rope hinge piece is hinged to the unlocking piece on the lock body; one end of the rope loop is fixedly connected to the lock bolt seat through a steel rope loop fixing seat, and the other end is fixedly connected to the lock body box through a steel rope loop fixing seat; the lock bolt rod is equipped with a lock bolt spring, and the lock bolt spring always has a tendency to push the lock bolt rod in the closing direction.

[0025] The beneficial effects of the present invention are as follows: during implementation, the transmission rod can be rotated by external force to drive the generator to generate electricity, and the storage element (such as a super capacitor) can be charged through the rectifier element on the control panel. When the voltage is charged to a certain level, the control panel will enter the working state, and the external force rotation and power generation can be stopped at this time. The stored electric energy is enough to make the lock work for a period of time. When the built-in battery is insufficient, there is no need to replace the battery, and even when the battery is not installed, there is no need for an external power supply to charge, and normal unlocking can be achieved. In addition, the switch lock mechanism of the present invention adopts a clutch control mechanism composed of a transmission rod, a clutch latch, a clutch latch compression spring, a clutch sleeve, a clutch push pin, a screw spring, a spring screw motor, a clutch seat and other components, and the structure is simple and reliable. The electronic manhole cover lock can be used not only to lock the manhole cover, but also to lock room doors, cabinet doors, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an exploded view of the various parts when the present invention is installed and implemented.

[0027] Figure 2 It is an exploded view of the various parts of the lock body of the present invention.

[0028] Figure 3A It is a three-dimensional structural schematic diagram of the transmission shaft in the present invention.

[0029] Figure 3B It is a half-section three-dimensional structural schematic diagram of the transmission shaft in the present invention.

[0030] Figure 4A It is a three-dimensional structural schematic diagram of the clutch sleeve in the present invention.

[0031] Figure 4B It is a semi-sectioned three-dimensional structural schematic diagram of the clutch sleeve in the present invention.

[0032] Figure 5A It is a three-dimensional structural schematic diagram of the clutch seat in the present invention.

[0033] Figure 5B It is a half-section three-dimensional structural schematic diagram of the clutch seat in the present invention.

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of the spring screw motor after assembly in the present invention.

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the clutch pin in the present invention.

[0036] Fig. 8A It is a schematic diagram of the three-dimensional structure of the locking bolt after being assembled in the present invention.

[0037] Figure 8B It is a schematic diagram of the three-dimensional structure of the lock bolt after being disassembled in the present invention.

[0038] Figure 8C It is a schematic diagram of the three-dimensional structure when the lock bolt is in an unlocked state in the present invention.

[0039] Fig.8D It is a schematic diagram of the three-dimensional structure when the lock bolt is in a locked state in the present invention.

[0040] Fig. 9 It is a semi-sectioned three-dimensional structural schematic diagram of the present invention when it is in a locked state.

[0041] Fig.10 It is a schematic diagram of the front view structure of the present invention when it is in a locked state.

[0042] Fig.11 It is a schematic diagram of the three-dimensional structure of the lock body part when the present invention is in a locked state.

[0043] Fig.12 It is a three-dimensional structural schematic diagram of the present invention when it is in a locked state.

[0044] Fig.13 It is a schematic diagram of the structure in the front view direction when the present invention is in the second waiting to be opened state.

[0045] Fig.14 It is a schematic diagram of the three-dimensional structure of the present invention when it is in the second state of waiting to be opened.

[0046] Fig.15 It is a front view structural schematic diagram of the present invention when it is in a waiting to be opened state.

[0047] Fig.16 It is a schematic diagram of a half-sectioned three-dimensional structure of the present invention when it is in a state to be opened.

[0048] Fig.17 It is a schematic diagram of the three-dimensional structure of the present invention in another viewing angle when it is in a waiting-to-be-opened state.

[0049] Fig.18 It is a schematic diagram of the three-dimensional structure of the lock body part when the present invention is in an open state.

[0050] Fig.19 It is a three-dimensional structural schematic diagram of the lock body part of the present invention when it is in an open state at another viewing angle.

[0051] Fig. 20 It is a schematic diagram of the three-dimensional structure of the present invention when it is in an open state.

[0052] Fig.21 It is a semi-sectioned three-dimensional structural schematic diagram of the present invention when it is in a state to be locked.

[0053] Fig. 22 It is a schematic diagram of the three-dimensional structure of the lock body part of the present invention when it is in a waiting state to be locked.

[0054] Fig.23 It is a three-dimensional structural schematic diagram of the lock body part of the present invention when it is in a waiting-to-lock state at another viewing angle.

[0055] Fig.24 It is a three-dimensional structural schematic diagram of the present invention when it is in a state to be locked.

[0056] The markings in the figure are:

[0057] mark name mark name mark name 1 Crank 601 Lock cover mounting screws 613 Locking plate hinge nail 2 Steel rope set 602 Lock body cover 614 Locking plate fixing nut 3 Transmission sleeve 603 Lock body fixing screw 616 Generator transmission gear 4 Manhole Cover 604 dynamo 617 Clutch pin 5 Transmission sleeve nut 605 Transmission rod 618 Clutch bayonet spring 6 Lock body 606 Clutch sleeve 619 Detent spring 7 Lock bolt 607 Clutch seat fixing screw 620 Blocking marbles 8 Mounting Screws 608 Clutch seat 621 Spring screw motor 9 Well Circle 610 Control Panel 622 Screw spring 611 Lock box 623 Clutch Sales Promotion 612 Locking piece 626 Storage element 605-A Clutch hole 605-B Transmission rod total transmission position 605-C Transmission rod power generation transmission position 606-A Transmission rod socket hole 606-B Clutch pin hole 606-C Clutch sleeve positioning hole 606-D Locking piece socket 606-F Limit pin 608-A Spring screw hole 608-B Screw spring slot 608-C1 Close limit 608-C2 Open limit 608-D Spring screw motor hole 608-E Clutch push pin hole 608-F Card slot 621-A Screw shaft 621-B Screw pin 621-C Motor 617-A Bayonet lever 617-B Bayonet boss 617-C Bayonet drive rod 701 Lock bolt lock bar 702 Lock bolt seat 703 Lock bolt spring 201 Wire Rope 202 Steel rope set fixing seat 203 Rope 204 Wire rope hinge DETAILED DESCRIPTION

[0058] The present invention will be further described below in conjunction with the accompanying drawings.

[0059] like Figures 1 to 24 As shown, the present invention includes a lock body 6 and a lock bolt 7, the lock body 6 includes a lock body box 611, and the lock body 6 also includes a generator 604, a storage element 626, a control board 610, a clutch latch 617, a clutch latch compression spring 618, a clutch sleeve 606, a clutch push pin 623, a screw spring 622, a spring screw motor 621, a clutch seat 608 and a transmission rod 605. The generator 604, the storage element 626, and the spring screw motor 621 are all electrically connected to the control board 610. In order to make the structure simple and reliable, the generator 604, the storage element 626 and the control board 610 can be fixedly arranged inside the lock body box 611 at a suitable position.

[0060] The clutch seat 608 is fixedly arranged in the lock body box 611, and the clutch seat 608 can generally be fixedly installed by the clutch seat fixing screw 607. The transmission rod 605, the clutch sleeve 606, and the clutch seat 608 are installed concentrically from the inside to the outside in sequence, and the transmission rod 605 forms a rotational fit with the transmission rod sleeve hole 606-A in the middle of the clutch sleeve 606, and the clutch sleeve 606 forms a rotational fit with the sleeve hole in the middle of the clutch seat 608; the transmission rod 605 is provided with a clutch hole 605-A on the rotational fit surface with the clutch sleeve 606. In addition, the transmission rod 605 is connected to the input shaft of the generator 604 in a transmission manner; various transmission structures in the prior art can be used, as long as the requirement that the input shaft of the generator 604 can be driven to rotate by rotating the transmission rod 605 is met. In order to make the structure simple and reliable, in this embodiment, the middle part of the transmission rod 605 is sleeved with a power generation transmission gear 616, and the two can rotate synchronously together, and the power generation transmission gear 616 forms a gear transmission connection structure with the input shaft of the generator 604. In order to facilitate assembly with the manhole cover 4 and facilitate operation, one end of the transmission rod 605 is sleeved in the clutch sleeve 606, and the other end is connected to the crank 1 through the transmission sleeve 3. The transmission sleeve 3 and the crank 1 can rotate synchronously with the transmission rod 605. During implementation, the transmission sleeve 3 is installed at the position of the manhole cover 4. The external force shakes the crank 1, which will drive the generator 604 to generate electricity through the above relationship. The generated electricity charges the storage element 626 (such as a super capacitor) through the rectifier element on the control board 610. When charged to a certain voltage, the control board 610 will enter the working state. At this time, the external force can be stopped to rotate and generate electricity. The stored electrical energy is enough to make the lock work for a period of time.

[0061] The side of the clutch seat 608 is provided with an assembly hole whose axis is radially arranged along the sleeve hole in the middle of the clutch seat 608. In the radial direction from the outside of the clutch seat 608 to the center of the clutch seat 608, the assembly hole includes a spring screw motor hole 608-D, a spring screw hole 608-A and a clutch push pin hole 608-E in sequence. The side wall of the spring screw hole 608-A is provided with a screw spring groove 608-B, which is a strip groove arranged axially along the spring screw hole 608-A. The output shaft of the spring screw motor 621 is threadedly connected with a screw shaft 621-A, a screw pin 621-B is radially arranged on the screw shaft 621-A, a screw spring 622 is sleeved on the screw shaft 621-A, and tentacles extend from both ends of the screw spring 622; the spring screw motor 621 is installed in the spring screw motor hole 608-D, the screw shaft 621-A and the screw spring 622 are arranged in the spring screw hole 608-A, and the tentacles at both ends of the screw spring 622 are inserted into the screw spring slot 608-B. Figure 5A , Figure 5B , Figure 6 and Fig.10The spring screw motor 621, the screw spring 622, and the screw spring groove 608-B together constitute a spring screw, and the spring screw is installed in the spring screw motor hole 608-D and the spring screw hole 608-A. The spring screw can drive the screw pin 621-B to move along the spiral direction of the screw spring 622.

[0062] The diameter of the clutch push pin hole 608-E is smaller than the diameter of the spring screw hole 608-A. The clutch push pin 623 is installed in the clutch push pin hole 608-E. The clutch push pin 623 is a T-pin. The large end of the clutch push pin 623 is located in the spring screw hole 608-A, so that the small end of the clutch push pin 623 does not exceed the end surface of the clutch push pin hole 608-E close to the center of the clutch sleeve 606.

[0063] A clutch pin hole 606-B is provided on the side of the clutch sleeve 606, and the axis is arranged radially along the transmission rod socket hole 606-A in the middle of the clutch sleeve 606. The clutch pin 617 is inserted in the clutch pin hole 606-B and can move axially along the clutch pin hole 606-B. The clutch pin hole 606-B is a stepped hole, and the small diameter end of the clutch pin hole 606-B is located at the end close to the center of the clutch sleeve 606.

[0064] A pin boss 617-B is provided in the middle of the clutch pin 617, one end of the clutch pin 617 close to the center of the clutch sleeve 606 is a pin rod 617-A, and the other end is a pin transmission rod 617-C; the outer diameter specification of the pin boss 617-B is larger than the diameter of the small diameter end of the clutch pin hole 606-B, and smaller than the diameter of the large diameter end of the clutch pin hole 606-B; the diameter of the pin transmission rod 617-C is smaller than the diameter of the clutch push pin hole 608-E, and the outer diameter specification of the pin boss 617-B is larger than the diameter of the clutch push pin hole 608-E.

[0065] The clutch pin compression spring 618 is sleeved on the pin rod 617-A, one end of the clutch pin compression spring 618 is connected to the step surface of the clutch pin hole 606-B, and the other end is connected to the pin boss 617-B; when the transmission rod 605 rotates to the position where the clutch hole 605-A and the clutch pin hole 606-B are coaxial, and the clutch pin 617 moves toward the center direction of the clutch sleeve 606, the pin rod 617-A of the clutch pin 617 can be inserted into the clutch hole 605-A on the transmission rod 605, and the pin transmission rod 617-C is disengaged from the clutch push pin hole 608-E on the clutch seat 608.

[0066] When the clutch sleeve 606 rotates to a position where the clutch pin hole 606-B is coaxial with the clutch push pin hole 608-E, the clutch pin compression spring 618 in a free state can move the pin boss 617-B on the clutch pin 617 to the interface between the clutch seat 608 and the clutch sleeve 606, and make the pin transmission rod 617-C of the clutch pin 617 inserted into the clutch push pin hole 608-E on the clutch seat 608, and the pin rod 617-A disengages from the clutch hole 605-A on the transmission rod 605.

[0067] The elastic coefficient K of the screw spring 622 is greater than the elastic coefficient K of the clutch pin compression spring 618 .

[0068] The lock bolt 7 includes a lock bolt rod 701 and a lock bolt seat 702. The lock bolt rod 701 is slidably installed on the lock bolt seat 702. A locking plate 612 is fixedly connected to the clutch sleeve 606. The locking plate 612 is connected to the lock bolt rod 701 through a transmission mechanism. When the locking plate 612 rotates with the clutch sleeve 606, it can drive the lock bolt rod 701 to slide on the lock bolt seat 702.

[0069] During implementation, the lock body 6 and the lock bolt 7 are both fixedly mounted on the manhole cover 4. The lock body 6 is generally fixed to the center of the inner surface of the manhole cover 4 through the lock body box 611. For easy installation, the preferred assembly method is that the lock body box 611 is equipped with a lock cover plate 602, and the two are fixedly connected through the lock body cover mounting screws 601; the lock cover plate 602 is provided with an assembly hole for the lock body fixing screw 603 to pass through. During implementation, the lock body 6 is fixedly mounted on the manhole cover 4 through the lock body fixing screw 603. The lock bolt seat 702 in the lock bolt 7 can be fixedly mounted on the manhole cover 4 through the mounting screw 8. The lock bolt seat 702 is set at the edge of the manhole cover 4. When the lock bolt 7 enters the locked state, the lock bolt lock rod 701 in the lock bolt 7 can be inserted into the lock buckle on the manhole ring 9 to form a locking structure.

[0070] In order to facilitate the switch limit of the lock body 6, the present invention realizes the limit through the closing limit 608-C1, the opening limit 608-C2, and the limit pin 606-F, and the specific structure is as follows: the clutch seat 608 is provided with a limit card slot on the rotation matching surface with the clutch sleeve 606, one side wall of the limit card slot is the closing limit 608-C1, and the other side wall is the opening limit 608-C2, the clutch sleeve 606 is fixedly provided with a limit pin 606-F on the rotation matching surface with the clutch seat 608, and the limit pin 606-F is inserted into the limit card slot on the clutch seat 608. The limit card slot can be a notch structure, and when the clutch is in the connected state, the clutch sleeve 606 can only rotate in the notch between the closing limit 608-C1 and the opening limit 608-C2.

[0071] In order to facilitate the stable maintenance of the switch limit point of the lock body 6, the present invention provides a locking groove 608-F on the rotating matching surface of the clutch seat 608 and the clutch sleeve 606, and the clutch sleeve 606 is provided with a clutch sleeve locking hole 606-C on the rotating matching surface with the clutch seat 608. A locking spring 619 and a locking ball 620 are installed in the clutch sleeve locking hole 606-C. When the lock is in the closed position and the unlocked position, the outer end of the locking ball 620 is locked in the locking groove 608-F on the clutch seat 608.

[0072] In order to make the structure more stable and reliable, the clutch sleeve locking holes 606-C can be set to two, and the locking grooves 608-F can be set to four. That is, when the lock is in the locked position, the clutch sleeve locking hole 606-C is aligned with two of the locking grooves 608-F, and the outer end of the locking marble 620 is locked in the corresponding locking groove 608-F on the clutch seat 608; when the lock is in the unlocked position, the clutch sleeve locking hole 606-C is aligned with the other two locking grooves 608-F, and the outer end of the locking marble 620 can also be locked in the corresponding locking groove 608-F on the clutch seat 608.

[0073] When the lock is in the locked position and the unlocked position, the locking ball 620 is just stuck in the locking groove 608-F, so that it has a better stable state in the locked position and the unlocked position. To get out of this stable state, a relatively large rotational torque needs to be applied to the clutch sleeve 606, and the overall structure is safer and more reliable.

[0074] In order to make the structure simple and reliable, the end of the clutch sleeve 606 has a protruding threaded rod, which is arranged coaxially with the clutch sleeve 606. The locking plate 612 has an assembly hole for the threaded rod to pass through, and the locking plate 612 is fixed to the clutch sleeve 606 by the locking plate fixing nut 614; the locking plate 612 has symmetrically arranged drive plates on both sides, and each drive plate is connected to a locking bolt 7. During installation, the locking bolt 7 is arranged on both sides of the manhole cover 4 to achieve a stable locking structure.

[0075] The working mode of the present invention is as follows:

[0076] refer to Fig.10 and Fig.11 In the locked state, the pin transmission rod 617-C of the clutch pin 617 is inserted into the clutch push pin hole 608-E on the clutch seat 608, the pin rod 617-A is disengaged from the clutch hole 605-A on the transmission rod 605, and the screw spring 622 is completely pushed to the right end of the screw pin 621-B (the end close to the motor 621-C).

[0077] Before unlocking the lock, use external force to shake the handle 1, which will drive the generator 604 to generate electricity. The generated electricity will charge the storage element 626 (such as a supercapacitor) through the rectifier element on the control board 610. When charged to a certain voltage, the control board 610 will enter the working state. At this time, the external force rotation and power generation can be stopped. The stored electrical energy is enough to keep the lock working for a period of time.

[0078] At this time, if the control board 610 receives the unlocking command, it will drive the motor 621-C in the spring screw motor 621 to rotate forward a certain number of times, and the screw spring 622 will be completely pushed to the left end of the screw pin 621-B (the end away from the motor 621-C). When the clutch hole 605-A of the transmission rod 605 is not concentric with the clutch latch 617 or is concentric but not connected, the clutch latch 617 cannot enter the clutch hole 605-A, and the clutch latch 617 and the clutch push pin 623 remain stationary. Fig.13 and Fig.14 As shown, the lock enters the waiting-to-open state 2. When the transmission rod 605 is rotated to a certain moment, the clutch hole 605-A of the transmission rod 605 is concentric with the clutch bayonet 617 and connected, because the elastic coefficient K of the screw spring 622 is much larger than the elastic coefficient K of the clutch bayonet compression spring 618, the screw spring 622 will sequentially generate thrust on the clutch push pin 623, the clutch bayonet 617, and the clutch bayonet compression spring 618, and the clutch push pin 623 and the clutch bayonet 617 will sequentially move to the left. At this time, the clutch bayonet 617 is located between the clutch hole 605-A and the clutch bayonet hole 606-B, and the clutch push pin 623 is pushed to the interface between the clutch seat 608 and the clutch sleeve 606. The bayonet transmission rod 617-C of the clutch bayonet 617 is separated from the spring screw hole 608-A, and the clutch is in a connected state. The lock enters the waiting-to-open state 1, as shown. Fig.15 At this time, rotating the transmission rod 605 will drive the clutch sleeve 606 to rotate together, so that the lock is in the unlocked state, as shown in FIG. Fig.18 and Fig.19 shown.

[0079] When the sensor (conventional method, not shown) of the control board 610 detects that the lock is opened, the control motor 621-C is reversed for a certain number of turns, and the screw spring 622 is completely pushed to the right end of the screw pin 621-B (the end close to the motor 621-C), and the lock enters the waiting state. The thrust from the screw spring 622 to the clutch push pin 623 disappears, but the lock is still in the open state. Fig. 22 and Fig.23 shown.

[0080] When the lock is in the open state, if the transmission rod 605 is rotated in the locking direction at this time, until the clutch hole 605-A, the clutch bayonet hole 606-B, and the spring screw hole 608-A form a concentric shape, the elastic force of the clutch bayonet compression spring 618 will push the clutch bayonet 617 and the clutch push pin 623 to move to the right in sequence. At this time, the clutch bayonet 617 is disengaged from the clutch hole 605-A, and the rotating transmission rod 605 will not be able to drive the clutch sleeve 606 to rotate, that is, the clutch is in the disengaged state, and the lock also enters the closed state. Fig.10 and Fig.11 shown.

[0081] Similarly, when the lock is in the waiting to be opened state 2 or the waiting to be opened state 1, after the control motor 621-C is reversed a certain number of times, the screw spring 622 is completely pushed to the right end of the screw pin 621-B (close to the motor 621-C end), and the lock also enters the closed state. Fig.10 and Fig.11 shown.

[0082] The unlocking piece 612 and the lock bolt rod 701 can be connected through a connecting rod mechanism, which can be implemented with reference to the crank connecting rod structure. Through the rotation of the unlocking piece 612, the lock bolt rod 701 can be driven to reciprocate in the guide hole on the lock bolt seat 702.

[0083] For the unlocking mechanism, the present invention also provides another preferred implementation mode: the unlocking piece 612 is connected to the lock bolt rod 701 through a steel rope loop 2, the steel rope loop 2 includes a steel wire rope 201 and a rope loop 203, the rope loop 203 is arranged on the outside of the steel wire rope 201, so that the steel wire rope 201 can slide axially in the rope loop 203; the length of the steel wire rope 201 is greater than the length of the rope loop 203, so that the two ends of the steel wire rope 201 both extend out of the rope loop 203, one end of the steel wire rope 201 is fixedly connected to the lock bolt rod 701, and the other end is fixedly connected to the steel wire rope hinge piece 204; the steel wire rope hinge piece 204 is hinged to the unlocking piece 612 on the lock body 6, and in specific implementation, the hinged connection between the two can generally be achieved through the unlocking piece hinge nail 613. One end of the rope loop 203 is fixedly connected to the bolt seat 702 through the steel rope loop fixing seat 202, and the other end is fixedly connected to the lock body box 611 through the steel rope loop fixing seat 202; the bolt lock rod 701 is equipped with a bolt spring 703, and the bolt spring 703 always has a tendency to push the bolt lock rod 701 toward the locking direction. The bolt spring 703 can generally be installed between the end of the bolt lock rod 701 and the limiter at the tail end of the bolt seat 702. The end of the steel wire rope 201 can pass through the bolt spring 703 and then be fixedly connected to the bolt lock rod 701. The steel rope loop 2 can be implemented with reference to the bicycle brake line structure. After the steel rope loop 2 is installed, no matter how the rope loop 203 is bent, the steel wire rope 201 can slide axially in the rope loop 203. When unlocking, the unlocking piece 612 rotates in the unlocking direction, driving the wire rope hinge piece 204 to rotate, and then driving the wire rope 201 and the lock bolt lock rod 701 to shrink toward the center of the manhole cover 4 in turn, the lock bolt spring 703 is energized, and the lock bolt lock rod 701 stuck in the well ring 9 of the manhole cover 4 completely enters the manhole cover 4, and the manhole cover 4 can be opened. Fig.8D The status shown changes to Figure 8C In the state shown, due to the existence of the switch limit point steady-state maintenance mechanism, although the lock bolt spring 703 is charged, the lock bolt rod 701 cannot move radially at this time. When the lock is closed, the unlocking piece 612 rotates in the locking direction, and its pulling force on the wire rope 201 gradually disappears. The lock bolt spring 703 with charged energy drives the wire rope 201 and the lock bolt rod 701 to move toward the well ring 9 in turn, and the lock bolt rod 701 is stuck between the well cover 4 and the well ring 9, and the well cover 4 is closed. Figure 8C The status shown changes to Fig.8D The connection mode of the steel rope sleeve 2 can have better adaptability, and the same steel rope sleeve 2 can adapt to manhole covers 4 of different sizes, and the installation position of the lock bolt 7 has little constraint relationship with the lock body 6.

Claims

1. An electronic manhole cover lock, comprising a lock body (6) and a lock bolt (7), wherein the lock body (6) comprises a lock body box (611), characterized in that: The lock body (6) further comprises a generator (604), a power storage element (626), a control panel (610), a clutch latch (617), a clutch latch compression spring (618), a clutch sleeve (606), a clutch push pin (623), a screw spring (622), a spring screw motor (621), a clutch seat (608) and a transmission rod (605); The clutch seat (608) is fixedly arranged in the lock body box (611), and the transmission rod (605), the clutch sleeve (606), and the clutch seat (608) are concentrically installed from the inside to the outside in sequence, and the transmission rod (605) and the transmission rod sleeve hole (606-A) in the middle of the clutch sleeve (606) form a rotational fit, and the clutch sleeve (606) and the sleeve hole in the middle of the clutch seat (608) form a rotational fit; The transmission rod (605) is drivingly connected to the input shaft of the generator (604); The transmission rod (605) is provided with a clutch hole (605-A) on a rotationally mating surface with the clutch sleeve (606); The side surface of the clutch seat (608) is provided with an assembly hole whose axis is radially arranged along the sleeve hole in the middle of the clutch seat (608); in the radial direction from the outside of the clutch seat (608) to the center of the clutch seat (608), the assembly hole includes a spring screw motor hole (608-D), a spring screw hole (608-A) and a clutch push pin hole (608-E) in sequence; the side wall of the spring screw hole (608-A) is provided with a screw spring groove (608-B), and the screw spring groove (608-B) is a strip groove arranged axially along the spring screw hole (608-A); The output shaft of the spring screw motor (621) is threadedly connected to a screw shaft (621-A), a screw pin (621-B) is radially arranged on the screw shaft (621-A), a screw spring (622) is sleeved on the screw shaft (621-A), and tentacles extend from both ends of the screw spring (622); the spring screw motor (621) is installed in a spring screw motor hole (608-D), the screw shaft (621-A) and the screw spring (622) are arranged in the spring screw hole (608-A), and the tentacles at both ends of the screw spring (622) are inserted into the screw spring groove (608-B); The diameter of the clutch push pin hole (608-E) is smaller than the diameter of the spring screw rod hole (608-A). The clutch push pin (623) is installed in the clutch push pin hole (608-E). The clutch push pin (623) is a T-shaped pin. The large end of the clutch push pin (623) is located in the spring screw rod hole (608-A), so that the small end of the clutch push pin (623) does not exceed the end surface of the clutch push pin hole (608-E) close to the center of the clutch sleeve (606); A clutch bayonet hole (606-B) is provided on the side of the clutch sleeve (606) and is arranged radially along the transmission rod sleeve connection hole (606-A) in the middle of the clutch sleeve (606). The clutch bayonet (617) is inserted into the clutch bayonet hole (606-B) and can move axially along the clutch bayonet hole (606-B). The clutch bayonet hole (606-B) is a stepped hole, and the small diameter end of the clutch bayonet hole (606-B) is located at an end close to the center of the clutch sleeve (606). A bayonet boss (617-B) is provided in the middle of the clutch bayonet (617); one end of the clutch bayonet (617) close to the center of the clutch sleeve (606) is a bayonet rod (617-A), and the other end is a bayonet transmission rod (617-C); the outer diameter of the bayonet boss (617-B) is larger than the diameter of the small diameter end of the clutch bayonet hole (606-B) and smaller than the diameter of the large diameter end of the clutch bayonet hole (606-B); the diameter of the bayonet transmission rod (617-C) is smaller than the diameter of the clutch push pin hole (608-E), and the outer diameter of the bayonet boss (617-B) is larger than the diameter of the clutch push pin hole (608-E); The clutch bayonet compression spring (618) is sleeved on the bayonet rod (617-A), one end of the clutch bayonet compression spring (618) is connected to the step surface of the clutch bayonet hole (606-B), and the other end is connected to the bayonet boss (617-B); when the transmission rod (605) rotates to a position where the clutch hole (605-A) and the clutch bayonet hole (606-B) are coaxial, and the clutch bayonet (617) moves toward the center of the clutch sleeve (606), the bayonet rod (617-A) of the clutch bayonet (617) can be inserted into the clutch hole (605-A) on the transmission rod (605), and the bayonet transmission rod (617-C) is disengaged from the clutch push pin hole (608-E) on the clutch seat (608); When the clutch sleeve (606) rotates to a position where the clutch bayonet hole (606-B) and the clutch push pin hole (608-E) are coaxial, the clutch bayonet compression spring (618) can move the bayonet boss (617-B) on the clutch bayonet (617) to the interface between the clutch seat (608) and the clutch sleeve (606) in a free state, and the bayonet transmission rod (617-C) of the clutch bayonet (617) is inserted into the clutch push pin hole (608-E) on the clutch seat (608), and the bayonet rod (617-A) is disengaged from the clutch hole (605-A) on the transmission rod (605); The elastic coefficient K of the screw rod spring (622) is greater than the elastic coefficient K of the clutch bayonet compression spring (618); The lock bolt (7) comprises a lock bolt rod (701) and a lock bolt seat (702), the lock bolt rod (701) is slidably mounted on the lock bolt seat (702), a locking plate (612) is fixedly connected to the clutch sleeve (606), the locking plate (612) and the lock bolt rod (701) are connected via a transmission mechanism, and when the locking plate (612) rotates with the clutch sleeve (606), it can drive the lock bolt rod (701) to slide on the lock bolt seat (702); The generator (604), the power storage element (626), and the spring lead screw motor (621) are all electrically connected to the control board (610).

2. The electronic manhole cover lock according to claim 1, characterized in that: The clutch seat (608) is provided with a limit slot on the rotational mating surface with the clutch sleeve (606); one side wall of the limit slot is a closing limit (608-C1) and the other side wall is an opening limit (608-C2); the clutch sleeve (606) is fixedly provided with a limit pin (606-F) on the rotational mating surface with the clutch seat (608); the limit pin (606-F) is inserted into the limit slot on the clutch seat (608).

3. The electronic manhole cover lock according to claim 1, characterized in that: The clutch seat (608) is provided with a locking groove (608-F) on the rotational mating surface with the clutch sleeve (606); the clutch sleeve (606) is provided with a clutch sleeve locking hole (606-C) on the rotational mating surface with the clutch seat (608); a locking spring (619) and a locking marble (620) are installed in the clutch sleeve locking hole (606-C); when the lock is in the locking position and the unlocking position, the outer end of the locking marble (620) is locked in the locking groove (608-F) on the clutch seat (608).

4. The electronic manhole cover lock as claimed in claim 2, characterized in that: The number of the clutch sleeve locking holes (606-C) is two, and the number of the locking slots (608-F) is four.

5. The electronic manhole cover lock according to claim 1, characterized in that: The middle part of the transmission rod (605) is sleeved with a power generation transmission gear (616), and the two can rotate synchronously together, and the power generation transmission gear (616) and the input shaft of the generator (604) form a gear transmission connection structure.

6. The electronic manhole cover lock according to claim 1, characterized in that: One end of the transmission rod (605) is sleeved in the clutch sleeve (606), and the other end is connected to the crank (1) via the transmission sleeve (3). The transmission sleeve (3) and the crank (1) can rotate synchronously with the transmission rod (605).

7. The electronic manhole cover lock according to claim 1, characterized in that: The lock body box (611) is provided with a lock cover plate (602), and the two are fixedly connected via lock body cover mounting screws (601); the lock cover plate (602) is provided with an assembly hole for the lock body fixing screws (603) to pass through; the generator (604), the storage element (626) and the control board (610) are fixedly arranged inside the lock body box (611).

8. The electronic manhole cover lock according to claim 1, characterized in that: The end of the clutch sleeve (606) has a protruding threaded rod, which is coaxially arranged with the clutch sleeve (606). The locking plate (612) has an assembly hole for the threaded rod to pass through, and the locking plate (612) is fixed to the clutch sleeve (606) by a locking plate fixing nut (614). The locking plate (612) has symmetrically arranged drive plates on both sides, and each drive plate is connected to a lock bolt (7).

9. The electronic manhole cover lock according to any one of claims 1 to 8, characterized in that: The unlocking piece (612) and the locking bolt locking rod (701) are connected via a connecting rod mechanism.

10. The electronic manhole cover lock according to any one of claims 1 to 8, characterized in that: The unlocking piece (612) and the lock bolt rod (701) are connected via a steel rope sleeve (2), the steel rope sleeve (2) comprising a steel wire rope (201) and a rope sleeve (203), the rope sleeve (203) being sleeved outside the steel wire rope (201) so that the steel wire rope (201) can slide axially inside the rope sleeve (203); the length of the steel wire rope (201) is greater than the length of the rope sleeve (203), so that both ends of the steel wire rope (201) extend out of the rope sleeve (203), one end of the steel wire rope (201) is fixedly connected to the lock bolt rod (701), and the other end is fixedly connected to the steel wire rope hinge piece (204); the steel wire rope hinge piece (204) is hingedly connected to the unlocking piece (612) on the lock body (6); One end of the rope loop (203) is fixedly connected to the lock bolt seat (702) through the steel rope loop fixing seat (202), and the other end of the rope loop is fixedly connected to the lock body box (611) through the steel rope loop fixing seat (202); The locking bolt rod (701) is provided with a locking bolt spring (703), and the locking bolt spring (703) always has a tendency to push the locking bolt rod (701) in the locking direction.

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