Electronic safety clamp

Abstract

To provide an electronic safety clamp capable of improving the security of elevator boarding.SOLUTION: An electronic safety clamp includes a base plate 1, a clamping mechanism 3, and a controller. A rail body passageway through which a guide rail 2 can pass is provided on the front side of the base plate 1. The clamping mechanism 3 is attached to both the left and right sides of the rail body passageway. The clamping mechanism includes a housing, a first motor, a movable wheel, a clamping block, a transmission assembly, and a second motor. The movable wheel is driven to rotate by the second motor. The first motor can simultaneously switch the positions of the movable wheel and the clamping block via the transmission assembly so that one moves horizontally toward the guide rail and the other moves horizontally away from the guide rail. The controller is electrically connected to each of the two sets of clamping mechanisms 3 and can lower the car to a predetermined position at a relatively slow speed and then immediately stop the descent.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of elevators, and in particular to the technical field of electronic safety clamps. [Background technology]

[0002] The main vertical movement structures of an elevator are the car and the counterweight frame. Here, the car provides passenger space, and the counterweight frame, as a weight structure, must always face the car from above and below to reduce the operating load and enable smooth car acceleration. The car and the counterweight frame usually require the use of guide rails during operation. Guide rails are guide structures used in elevator operation, such as the guide rails of the modular elevator disclosed in utility model publication number CN220351420U. They are generally fixed vertically in the hoistway to provide a guide for the car and the counterweight frame for vertical linear movement.

[0003] A safety clamp is a safety device that can bring a car to an emergency stop in the event of an overspeed or runaway elevator, playing an important role in ensuring safety. Safety clamps, such as those in the utility model elevator safety clamp device with publication number CN211283314U, the patent elevator safety clamp with publication number CN108584610A, and the utility model bidirectional progressive elevator safety clamp with publication number CN213415929U, are typically mounted on the bottom bridge or pillars of the car and primarily comprise a clamp base, a clamp block movably mounted on the clamp base, and a drive mechanism for driving the movement of the clamp block. When the drive mechanism is not operating, the clamp blocks located on the left and right sides of the guide rail each maintain a gap of 2 to 3 mm with the guide rail. When the drive mechanism is operating, the left and right clamp blocks rapidly approach each other, clamping the guide rail together. However, such a rapid clamping operation can only instantaneously shift the car from a rising or falling state to a stopped state, and cannot slow the car's descent so that it can drop precisely onto a landing door at a certain floor to facilitate subsequent rescue or maintenance, while even a quick braking operation may result in injury to personnel inside the car due to a collision. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] CN211283314U [Patent Document 2] CN108584610A [Patent Document 3] CN213415929U Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention solves the problems in the prior art by providing an electronic safety clamp that can immediately stop the descent of a car after it has descended to a predetermined position at a relatively slow speed, facilitating subsequent rescue and maintenance, while also effectively preventing personnel inside the car from being hit and injured by a sudden descent or sudden stop, thereby improving the safety of elevator passengers. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides an electronic safety clamp comprising a base plate, a clamping mechanism, and a controller, wherein a rail body passageway through which a guide rail can pass is provided on the front side of the base plate, and clamping mechanisms are attached to both the left and right sides of the rail body passageway, and the clamping mechanism comprises a housing, a first motor, a movable wheel, a clamping block, a transmission assembly, and a second motor, the movable wheel is driven to rotate by the second motor, and the first motor can switch the positions of the movable wheel and the clamping block simultaneously by means of the transmission assembly so that one moves horizontally closer to the guide rail and the other moves horizontally away from the guide rail, and the controller is electrically connected to each of the two sets of clamping mechanisms.

[0007] Preferably, several rings are provided in the front side of the base plate in a longitudinal direction, which together can constitute a rail guide ring for the rail passage.

[0008] Preferably, an anti-slip sleeve is provided on the outside of the movable wheel.

[0009] Preferably, an anti-slip pad is attached to the clamp block on the side facing the guide rail.

[0010] Preferably, the transmission assembly includes an internal gear, an external gear, a central gear, a guide rod, a position limiting post, a position limiting block, a positioning gear, a rack, and a driving gear, wherein the internal gear is indirectly fixed to the housing through a shaft, the external gear is provided coaxially outside the internal gear and rotatably connected to the shaft, the central gear is provided in an annular passage located between the internal gear and the external gear, and meshes with the internal gear while being rotatably connected to the external gear, one end of the position limiting post horizontally passes through several position limiting blocks respectively fixed on the housing, and then The movable wheel and the second motor are fixed to a supporting frame, the guide rod is connected vertically to the top of a position limiting column and is provided with a rod slide groove, the wheel axle of the central gear is in sliding contact with the rod slide groove, the positioning gear and the driving gear are respectively rotatably connected to a housing, the driving gear meshes with the external gear and the positioning gear respectively and is driven to rotate by the first motor, the rack is provided obliquely and is in sliding contact with the housing while meshing with the positioning gear, and the clamp block is fixed on the rack.

[0011] Preferably, an end sleeve is removably attached to the free end of the position limiting post.

[0012] Preferably, a slider is provided on the rack, a through groove is provided in the wall of the housing, and the slider is in sliding contact with the through groove.

[0013] Preferably, the system further includes a monitoring mechanism, which is a combination of one or more of an infrared sensing system, a smart camera, a pressure sensing system, and a voice recognition system, and a communication mechanism, wherein the monitoring mechanism and the communication mechanism are each electrically connected to the controller. [Effects of the Invention]

[0014] 1) A clamping mechanism consisting of a housing, a first motor, a movable wheel, a clamping block, a transmission assembly, and a second motor is mounted on each of the left and right sides of the rail passage of the base plate. First, the movable wheel attached to the guide rail can be driven by the second motor to rotate in the opposite direction, so as to provide an upward thrust to the car and decelerate it. Second, the first motor can simultaneously switch the positions of the movable wheel and the clamping block, so that the clamping block clamps the guide rail to brake the car. Finally, the car can be lowered to a predetermined position at a relatively slow speed and then immediately stopped, which not only facilitates subsequent rescue and maintenance, but also effectively prevents personnel in the car from being hit and injured by a sudden descent or sudden stop, and improves elevator passenger safety.

[0015] 2) The transmission assembly is constructed by combining an internal gear, an external gear, a central gear, a guide rod, a position limiting column, a position limiting block, a positioning gear, a rack, and a driving gear, which simplifies the overall structure and converts the rotational action of the first motor into a lateral movement action of the movable wheel and a diagonal movement action of the clamping block, thereby achieving the position switching of the movable wheel and the clamping block and maintaining the clamping block to provide sufficient clamping force.

[0016] 3) By adding a monitoring mechanism consisting of one or a combination of an infrared sensing system, a smart camera, a pressure sensing system, and a voice recognition system, the safety clamp can more comprehensively sense the elevator's operating environment, avoiding misjudgments and insufficient response speed, and improving security and the accuracy of operation.

[0017] The features and advantages of the invention will now be explained in more detail by way of example with reference to the drawings. [Brief explanation of the drawings]

[0018] [Figure 1]FIG. 1 is a front view of an electronic safety clamp according to the present invention. [Figure 2] 1 is a schematic diagram of the three-dimensional structure of the electronic safety clamp according to the present invention when the upper guide rail is assembled to the base plate thereof; [Figure 3] 1 is a structural schematic diagram of the electronic safety clamp according to the present invention when the clamp mechanism extends from the movable wheel after removing the housing; FIG. [Figure 4] 1 is a structural schematic diagram of the electronic safety clamp according to the present invention when the clamp mechanism extends from the clamp block after removing the housing; FIG. [Figure 5] 2 is an assembly diagram of the guide rod, the position limiting column and the position limiting block of the electronic safety clamp according to the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] 1 to 5, an electronic safety clamp according to the present invention includes a base plate 1, a clamp mechanism 3, and a controller. A rail body passageway through which a guide rail 2 can pass is provided on the front side of the base plate 1. Clamp mechanisms 3 are attached to both the left and right sides of the rail body passageway. The clamp mechanism 3 includes a housing 31, a first motor 32, a movable wheel 33, a clamp block 34, a transmission assembly 35, and a second motor 36. The movable wheel 33 is driven to rotate by the second motor 36. The first motor 32 can simultaneously switch the positions of the movable wheel 33 and the clamp block 34 by the transmission assembly 35 so that one moves horizontally toward the guide rail 2 and the other moves horizontally away from the guide rail 2. The controller is electrically connected to each of the two sets of clamp mechanisms 3. Here, the base plate 1 is attached outside the car.

[0020] Several rings are provided in the front of the base plate 1 in the vertical direction, which together can form a rail guide ring 11 for the rail passage.

[0021] The movable wheel 33 is provided with an anti-slip sleeve on the outside.

[0022] An anti-slip pad is attached to the clamp block 34 on the side facing the guide rail 2.

[0023] The transmission assembly 35 includes an internal gear 351, an external gear 352, a medium gear 353, a guide rod 354, a position limiting post 355, a position limiting block 356, a positioning gear 357, a rack 358, and a driving gear 359. The internal gear 351 is indirectly fixed to the housing 31 through a shaft. The external gear 352 is provided coaxially outside the internal gear 351 and rotatably connected to the shaft. The medium gear 353 is provided in an annular passage located between the internal gear 351 and the external gear 352 and engages with the internal gear 351 while being rotatably connected to the external gear 352. One end of the position limiting post 355 is horizontally supported by several position limiting blocks 356 fixed on the housing 31. After passing through, the movable wheel 33 and the second motor 36 are fixed to the mounted support frame, the guide rod 354 is connected vertically to the position limiting column 355 and is provided with a rod slide groove, the wheel axle of the intermediate gear 353 is in sliding contact with the rod slide groove, the positioning gear 357 and the driving gear 359 are respectively rotatably connected to the housing 31, the driving gear 359 is respectively meshed with the external gear 352 and the positioning gear 357 and is driven to rotate by the first motor 32, the rack 358 is provided obliquely and is in sliding contact with the housing 31 while meshing with the positioning gear 357, and the clamp block 34 is fixed on the rack 358.

[0024] An end sleeve is removably attached to the free end of the position limiting post 355 .

[0025] A slider 3581 is provided on the rack 358 , and a through groove 311 is provided in the wall of the housing 31 , and the slider 3581 is in sliding contact with the through groove 311 .

[0026] The system further includes a monitoring mechanism, which is a combination of one or more of an infrared sensing system, a smart camera, a pressure sensing system, and a voice recognition system, and a communication mechanism, wherein the monitoring mechanism and the communication mechanism are each electrically connected to the controller. Here, the infrared sensing system is installed between the car door and door frame, so that when a person or object enters the closed area of ​​the car (infrared rays are blocked when a person or object passes through the car door), the electronic safety clamp is automatically triggered, preventing door-trap accidents. The smart camera uses image recognition technology to monitor the situation at the car door and, if it sees abnormal behavior (for example, a finger or other object being too close to the door slit), it can quickly activate the electronic safety clamp to ensure the car door is closed safely. The pressure sensing system is installed on the edge of the car door or inside the door frame and, if it detects abnormal resistance, immediately triggers the electronic safety clamp, reducing the probability of door-trap accidents. The voice recognition system uses voice recognition technology to monitor whether there are any abnormal sounds (for example, rescue sounds or abnormal noises) near the car door, so that the electronic safety clamp can be immediately activated to protect passenger safety. The communication mechanism can remotely notify maintenance personnel of any abnormal situations so that prompt countermeasures can be taken.

[0027] The working process of the present invention During daily operation, the movable wheel 33 is close to the guide rail 2, but the clamp block 34 is away from the guide rail 2. The movable wheel 33 can rotate along the guide rail 2 as the car moves up and down, so the safety clamp does not affect the movement of the car.

[0028] If an abnormal descent occurs in the car, the second motor 36 drives the movable wheel 33 to rotate in the opposite direction, generating a frictional force between the movable wheel 33 and the guide rail 2 that is capable of pushing the car up, slowing the car's descent speed. When the car, which is descending relatively slowly, reaches a predetermined position (i.e., when the car is directly facing the landing door of a certain floor), the first motor 32 switches the positions of the movable wheel 33 and the clamp block 34 via the transmission assembly 35, thereby moving the movable wheel 33 away from the guide rail 2 and bringing the clamp block 34 closer to the guide rail 2. In this case, the car can be braked by the pair of clamp blocks 34 that sandwich the guide rail 2.

[0029] During the switching process, the first motor 32 is turned on, driving the drive gear 359 to rotate on its axis, but the drive gear 359 can also drive the external gear 352 and positioning gear 357 to rotate on their axes simultaneously. Here, the rack 358 meshing with the positioning gear 357 moves the clamp block 34 vertically upward via a slider 3581 that slides obliquely along the through groove 311, while driving the clamp block 34 to gradually approach the guide rail 2. In addition, the middle gear 353 revolves around the internal gear 351 in conjunction with the external gear 352, and slides vertically along the rod slide groove of the guide rod 354 via the wheel axle. The guide rod 354 is driven in synchronization with the position limiting column 355, the movable wheel 33 attached on the position limiting column 355, and the second motor 36 so as to gradually move horizontally away from the guide rail 2 along each position limiting block 356.

[0030] The above examples are intended to illustrate the present invention, but are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention. [Explanation of symbols]

[0031] 1 base plate, 11 rail body guide ring, 2 guide rail, 3 clamp mechanism, 31 housing, 311 through groove, 32 first motor, 33 movable wheel, 34 clamp block, 35 transmission assembly, 351 internal gear, 352 external gear, 353 central gear, 354 guide rod, 355 position limiting column, 356 position limiting block, 357 positioning gear, 358 rack, 3581 slider, 359 drive gear, 36 second motor

Claims

1. 1. An electronic safety clamp comprising: a base plate (1), a clamp mechanism (3), and a controller; a rail body passageway through which a guide rail (2) can pass is provided on the front side of the base plate (1); clamp mechanisms (3) attached to both the left and right sides of the rail body passageway; the clamp mechanism (3) comprising a housing (31), a first motor (32), a movable wheel (33), a clamp block (34), a transmission assembly (35), and a second motor (36); the movable wheel (33) is driven to rotate by the second motor (36); the first motor (32) can simultaneously switch the positions of the movable wheel (33) and the clamp block (34) by the transmission assembly (35) so that one moves horizontally toward the guide rail (2) and the other moves horizontally away from the guide rail (2); and the controller is electrically connected to each of the two sets of clamp mechanisms (3).

2. 2. The electronic safety clamp according to claim 1, wherein several rings are provided vertically on the front side of the base plate (1), which together can form rail guide rings (11) for the rail passage.

3. 2. The electronic safety clamp according to claim 1, wherein the movable wheel (33) is provided with an anti-slip sleeve outside.

4. 2. An electronic safety clamp according to claim 1, characterized in that the clamping block (34) is fitted with an anti-slip pad on the side facing the guide rail (2).

5. The transmission assembly (35) includes an internal gear (351), an external gear (352), a medium gear (353), a guide rod (354), a position limiting post (355), a position limiting block (356), a positioning gear (357), a rack (358), and a driving gear (359). The internal gear (351) is indirectly fixed to the housing (31) through a shaft. The external gear (352) is provided coaxially outside the internal gear (351) and rotatably connected to the shaft. The medium gear (353) is provided in an annular passage located between the internal gear (351) and the external gear (352). The internal gear (351) is engaged with the internal gear (351) and is rotatably connected to the external gear (352). One end of the position limiting post (355) horizontally passes through several position limiting blocks (356) fixed on the housing (31), and then moves in a direction perpendicular to the shaft.

2. The electronic safety clamp according to claim 1, wherein the driving wheel (33) and the second motor (36) are fixed to a support frame mounted thereon; the guide rod (354) is vertically connected to a position limiting post (355) and is provided with a rod slide groove; the wheel axle of the central gear (353) is in sliding contact with the rod slide groove; the positioning gear (357) and the driving gear (359) are rotatably connected to the housing (31), respectively; the driving gear (359) is engaged with the external gear (352) and the positioning gear (357), respectively, and is driven to rotate by the first motor (32); the rack (358) is provided obliquely and is in sliding contact with the housing (31) while being engaged with the positioning gear (357); and the clamp block (34) is fixed on the rack (358).

6. 6. The electronic safety clamp of claim 5, wherein an end sleeve is removably attached to the free end of the position limiting post (355).

7. The electronic safety clamp of claim 5, characterized in that a slider (3581) is provided on the rack (358), a through groove (311) is provided in the wall of the housing (31), and the slider (3581) is in sliding contact with the through groove (311).

8. 8. The electronic safety clamp of claim 1, further comprising a monitoring mechanism, which is a combination of one or more of an infrared sensing system, a smart camera, a pressure sensing system, and a voice recognition system, and a communication mechanism, wherein the monitoring mechanism and the communication mechanism are each electrically connected to the controller.

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