CN114849092B

CN114849092B - Electric-adjusting descent control device

Info

Publication number: CN114849092B
Application number: CN202210619435.9A
Authority: CN
Inventors: 赵甲佳
Original assignee: Hangzhou Hetai Security Technology Co ltd
Current assignee: Hangzhou Hetai Security Technology Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2023-04-07
Anticipated expiration: 2042-06-02
Also published as: CN114849092A

Abstract

The invention belongs to the field of descent control devices, and particularly relates to an electrically-adjusted descent control device which comprises a shell, a motor, a rotating shaft B, an extrusion wheel A, a lifting rope, an extrusion wheel B, a pressing rod A, a bolt, an n-shaped rod, a limiting wheel, a plate spring, a rotating shaft C, a centrifugal wheel, a centrifugal block, a friction block and a friction ring, wherein the rotating shaft B driven by the motor and the hollow rotating shaft C in transmission connection with the rotating shaft B are rotatably matched in the shell, and the lifting rope is arranged on the extrusion wheel A arranged on the rotating shaft B. The invention can freely and effectively control the falling height of the escaper by grabbing the lifting rope at one side by hands, can realize hovering at a certain required height, and is easy to operate. Meanwhile, the automatic lifting device can automatically and effectively lift a rescuer upwards through the built-in motor, saves labor, and improves the application range and the utilization rate of the descent control device by overcoming the limitation of the conventional descent control device.

Description

Electric-adjusting descent control device

Technical Field

The invention belongs to the field of descent control devices, and particularly relates to an electrically-adjusted descent control device.

Background

The descent control device is a safety rescue device which can make people descend slowly along (along) a rope (belt). It can be installed on the window of building, balcony or flat top of building, or on the fire truck for rescuing the person in fire in high-rise building. When the slow descending device works, the slow descending rope drives the planet gear speed reducing mechanism in the main machine to operate and generate friction with a friction block in the friction wheel hub, so that a user is ensured to safely and slowly descend to the ground.

The existing descent control device has the following defects in the use process:

1. when the descent control device is used for descending, the descending height cannot be effectively controlled by gripping the rope ascending from the other side by hands, and the operation of controlling the descending height is difficult.

2. The existing descent control device does not have the function of lifting a person, only can play a role of effectively slowing down the descending speed, and has limitation in use.

The invention designs an electric-adjusting descent control device to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses an electric-regulation descent control device which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship that the product of the present invention is usually placed in when used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

An electric-adjusting descent control device comprises a shell, a motor, a rotating shaft B, an extrusion wheel A, a lifting rope, an extrusion wheel B, a pressing rod A, a bolt, an n-shaped rod, a limiting wheel, a plate spring, a rotating shaft C, a centrifugal wheel, a centrifugal block, a friction block and a friction ring, wherein the rotating shaft B driven by the motor and the hollow rotating shaft C in transmission connection with the rotating shaft B are rotatably matched in the shell, and the lifting rope is arranged on the extrusion wheel A arranged on the rotating shaft B; a pressing wheel B for tightly pressing the lifting rope on the pressing wheel A is arranged at the tail end of a pressing rod A which vertically slides in a chute A at the top in the shell, and a bolt which is rotationally matched with the upper end of the pressing rod A is screwed in a threaded hole at the top of the chute A; a centrifugal wheel arranged on the rotating shaft C is matched with a friction ring in the shell in a rotating way; friction blocks matched with the friction rings radially slide in the two sliding grooves E on the rim of the centrifugal wheel; an n-shaped rod is hinged in the shell through a swing pin, two plate springs for swinging and resetting the n-shaped rod are installed in the shell, and two branches of the n-shaped rod correspond to two branches of the lifting rope one by one; two limiting wheels for clamping one corresponding lifting rope are mounted at the tail ends of the two branches of the n-shaped rod.

The shell is internally provided with a structure which can prevent the rotating shaft B from rotating and increase the friction force between the friction block and the friction ring by manually swinging one lifting rope.

As a further improvement of the technology, the top end of the shell is provided with a hanging ring for providing a fixed hanging point for the shell, and the bottom of the shell is provided with a movable groove for facilitating the movement of a lifting rope; the upper end of the bolt is provided with an inner hexagonal groove matched with the hexagonal wrench; two ends of the rotating shaft B respectively rotate in the two circular grooves A on the shell; one end of the plate spring is connected with the inner wall of the shell, and the other end of the plate spring is connected with a corresponding branch of the n-shaped rod.

As a further improvement of the technology, a rotating shaft A is rotationally matched in a circular groove B on the shell, and a gear A arranged on the rotating shaft A is meshed with a gear B arranged on an output shaft of the motor; the gear C arranged on the rotating shaft A is meshed with three gears D arranged in the shell, the three gears D are meshed with a gear ring arranged in the shell, and the gear ring is meshed with a gear E arranged on the rotating shaft B; the gear E meshes with a gear F mounted on the rotating shaft C.

As a further improvement of the technology, the two ratchet wheels are coaxially arranged on the rotating shaft B, the rotation limiting directions of the two ratchet wheels are opposite, the two sides of the lifting rope are guaranteed to simultaneously and effectively prevent the rotating shaft B from rotating through the interaction of the ratchets on the two branches of the n-shaped rod and the corresponding ratchet wheels when one side of the lifting rope is pulled manually, and therefore the escaper can hover at a certain height in the air effectively. Arc-shaped pressing plates which are in one-to-one correspondence with the ratchet wheels are arranged on the inner sides of the two branches of the n-shaped rod, and ratchets matched with the corresponding ratchet wheels are uniformly and densely distributed on the inner sides of the pressing plates.

As a further improvement of the technology, the rotating shaft C is rotationally matched with a rotary seat in the shell; a trigger block axially slides in a chute B on the inner wall of the rotating shaft C, two chutes C which are correspondingly communicated with chutes E on the centrifugal wheel one by one are arranged on the inner wall of the chute B, a centrifugal block radially slides in each chute C, and each centrifugal block is connected with a corresponding friction block through a spring C; the inclined plane B of the end surface of the centrifugal block is matched with the corresponding inclined plane A on the trigger block; a pressing rod B axially slides in the guide rail on the rotary seat along the rotating shaft C; the tail end of the abutting rod B is provided with a stepped round block which has the same central axis with the rotating shaft C, the stepped round block is in rotary fit with an abutting block which axially slides in a sliding chute D in the trigger block, and a spring A for resetting the abutting block is arranged in the sliding chute D; the shell is internally provided with a spring B which resets the abutting rod B.

A rotating shaft D perpendicular to the rotating shaft C is rotatably matched on the rotating seat, and a gear G arranged on the rotating shaft D is meshed with teeth on the abutting rod B; two rotating shafts E which correspond to the two n-shaped rods one by one are rotatably matched on the rotating seat, and two gears H arranged on the rotating shafts D are respectively meshed with gears I arranged on the corresponding side rotating shafts E; the gear J arranged on the rotating shaft E is meshed with an arc-shaped rack which is fixed on a corresponding branch of the n-shaped rod and takes the central axis of the swing pin as the central axis. The arc-shaped rack ensures that the n-shaped rod is always meshed with the corresponding gear J when swinging around the swing pin.

As a further improvement of the technology, the spring a and the spring C are both compression springs; the spring B is an extension spring; one end of the spring B is connected with the inner wall of the shell, and the other end of the spring B is connected with the end face of the compression bar B; the rack slides in the guide sleeve on the rotary seat. The guide sleeve provides a guide rail for improving the strength of the corresponding rack for the movement of the rack, and the rack is guaranteed not to separate from the corresponding gear J.

As a further improvement of the technology, the transmission ratio of the gear F to the gear E is greater than 1, so that the centrifugal wheel is ensured to rotate rapidly in the falling and escaping process of an escaper fixed at one end of the lifting rope, and therefore, two friction blocks in the centrifugal wheel and the friction ring generate larger friction force, the falling speed of the escaper is effectively slowed down, and the function of the descent control device is fully exerted. The reference circle diameter ratio of the gear J to the corresponding gear I is smaller than 1, the transmission ratio of the gear I to the corresponding gear H is smaller than 1, and the reference circle diameter ratio of the gear H to the gear G is smaller than 1, so that the friction force between the friction block and the friction ring can be effectively improved instantly by the trigger block tightly pressing the friction block against the friction ring through the centrifugal block and the spring C when one side of the lifting rope is swung by a hand to a small extent, the descending speed and the ratchet wheel rotating speed are slowed down instantly, and the ratchet on the n-shaped rod is effectively matched with the ratchet wheel to realize quick and effective hovering in the air.

Compared with the traditional descent control device, the invention can freely and effectively control the falling height of the escaper by grabbing the lifting rope at one side by hands, can realize hovering at a certain required height, and is easy to operate. Meanwhile, the automatic lifting device can automatically and effectively lift a rescuer upwards through the built-in motor, saves labor, and simultaneously improves the application range and the utilization rate of the descent control device by overcoming the limitations of the conventional descent control device. The invention has simple structure and better use effect.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention and its entirety.

FIG. 2 is a schematic cross-sectional view of the rotation axis A and the rotation axis B in transmission connection with two viewing angles.

FIG. 3 is a schematic cross-sectional view of the bolt, the pressing rod A, the extruding wheel B, the extruding wheel A, the lifting rope and the limiting wheel.

FIG. 4 is a cross-sectional view of the n-bar, the pressing plate, the ratchet A and the ratchet.

FIG. 5 is a cross-sectional view of the friction ring, the centrifugal wheel, the friction block, the spring C, the centrifugal block, the trigger block and the pressing rod B.

Fig. 6 is a schematic sectional view of the transmission fit of the rack and the gear G.

Fig. 7 is a schematic cross-sectional view of the rack, the guide sleeve and the gear J.

Fig. 8 is a schematic sectional view of the housing.

FIG. 9 is a cross-sectional view of a centrifugal wheel and a rotating shaft C.

FIG. 10 is a cross-sectional view of a trigger block and an eccentric block.

FIG. 11 is a schematic view of the ratchet, pressing plate, n-bar, plate seat, limiting wheel and rack combination and its partial cross-section.

Number designation in the figure: 1. a housing; 2. a movable groove; 3. a chute A; 4. a threaded hole; 5. a circular groove A; 6. a circular groove B; 7. a rotating shaft A; 8. a gear A; 9. a gear B; 10. a motor; 11. a gear C; 12. a gear D; 13. a ring gear; 14. a gear E; 15. a rotating shaft B; 16. an extrusion wheel A; 17. a lifting rope; 18. an extrusion wheel B; 19. a pressing rod A is abutted; 20. a bolt; 21. hanging a ring; 22. a ratchet wheel; 24. swinging pin; 25. an n-type rod; 26. pressing the plate; 27. a ratchet; 29. a limiting wheel; 30. a rack; 31. rotating a base; 32. a rotating shaft C; 33. a chute B; 34. a chute C; 35. a gear F; 36. a trigger block; 37. an inclined plane A; 38. a chute D; 39. a pressing block; 40. a spring A; 41. a stepped round block; 42. a pressing rod B is abutted; 43. a guide rail; 44. a spring B; 45. a rotating shaft D; 46. a gear G; 47. a gear H; 48. a rotating shaft E; 49. a gear I; 50. gear J; 51. a guide sleeve; 52. a centrifugal wheel; 54. a chute E; 55. a centrifugal block; 56. a bevel B; 57. a spring C; 58. a friction block; 59. a friction ring; 60. a leaf spring.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1, 2 and 4, the device comprises a housing 1, a motor 10, a rotating shaft B15, an extrusion wheel a16, a lifting rope 17, an extrusion wheel B18, a pressing rod a19, a bolt 20, an n-shaped rod 25, a limiting wheel 29, a plate spring 60, a rotating shaft C32, a centrifugal wheel 52, a centrifugal block 55, a friction block 58 and a friction ring 59, wherein the rotating shaft B15 driven by the motor 10 and a hollow rotating shaft C32 in transmission connection with the rotating shaft B15 are rotatably matched in the housing 1 as shown in fig. 1 and 2, and the lifting rope 17 is installed on the extrusion wheel a16 installed on the rotating shaft B15; as shown in fig. 1, 3 and 8, a pressing wheel B for tightly pressing the lifting rope 17 against the pressing wheel a is mounted at the tail end of a pressing rod a19 which vertically slides in a chute A3 at the top in the shell 1, and a bolt 20 which is rotatably matched with the upper end of the pressing rod a19 is screwed in a threaded hole 4 at the top of the chute A3; as shown in fig. 1, 4 and 5, the centrifugal wheel 52 mounted on the rotating shaft C32 is rotatably engaged with a friction ring 59 in the housing 1; as shown in fig. 5 and 9, friction blocks 58 matched with friction rings 59 radially slide in two slide grooves E54 on the rim of the centrifugal wheel 52; as shown in fig. 4 and 11, an n-shaped rod 25 is hinged in the shell 1 through a swing pin 24 and two plate springs 60 for swinging and resetting the n-shaped rod 25 are installed in the shell, two n-shaped rods 25 correspond to two lifting ropes 17 one by one; two limiting wheels 29 for clamping a corresponding one of the lifting ropes 17 are arranged at the two tail ends of the n-shaped rod 25.

As shown in fig. 4, 5 and 6, the housing 1 has a structure that can prevent the rotation shaft B15 from rotating and increase the friction force between the friction block 58 and the friction ring 59 by manually swinging one of the ropes 17.

As shown in fig. 1 and 8, the top end of the shell 1 is provided with a hanging ring 21 for providing a fixed hanging point, and the bottom of the shell 1 is provided with a movable groove 2 for facilitating the movement of the lifting rope 17; as shown in fig. 1 and 3, the upper end of the bolt 20 is provided with an inner hexagonal groove matched with a hexagonal wrench; as shown in fig. 1 and 8, two ends of the rotating shaft B15 respectively rotate in two circular grooves A5 on the housing 1; as shown in fig. 4, one end of the plate spring 60 is connected to the inner wall of the housing 1, and the other end is connected to a corresponding one of the n-shaped bars 25.

As shown in fig. 2, a rotating shaft A7 is rotationally fitted in a circular groove B6 on the housing 1, and a gear A8 mounted on the rotating shaft A7 is engaged with a gear B9 mounted on an output shaft of a motor 10; the gear C11 installed on the rotating shaft A7 is meshed with three gears D12 installed in the shell 1, the three gears D12 are meshed with a gear ring 13 in the shell 1, and the gear ring 13 is meshed with a gear E14 installed on a rotating shaft B15; as shown in fig. 1 and 5, the gear E14 meshes with a gear F35 attached to the rotating shaft C32.

As shown in fig. 2, 4 and 11, two ratchets 22 are coaxially installed on the rotating shaft B15, and the directions of the two ratchets 22 limited to rotate are opposite, so that when one side of the lifting rope 17 is pulled manually, the two sides of the lifting rope 17 are simultaneously and effectively prevented from rotating by the interaction of the ratchets 27 on the two branches of the n-shaped rod 25 and the corresponding ratchets 22, and thus, the escaper can effectively hover at a certain height in the air. Arc-shaped pressing plates 26 which are in one-to-one correspondence with the ratchet wheels 22 are arranged on the inner sides of the two branches of the n-shaped rod 25, and ratchets 27 matched with the corresponding ratchet wheels 22 are uniformly and densely distributed on the inner side of each pressing plate 26.

As shown in fig. 1 and 5, the rotating shaft C32 is rotatably engaged with the rotary seat 31 in the housing 1; as shown in fig. 5, 9 and 10, a trigger block 36 axially slides in a chute B33 on the inner wall of the rotating shaft C32, two chutes C34 which are in one-to-one correspondence with chutes E54 on the centrifugal wheel 52 are formed on the inner wall of the chute B33, a centrifugal block 55 radially slides in each chute C34, and each centrifugal block 55 is connected with a corresponding friction block 58 through a spring C57; the inclined surface B56 of the end surface of the centrifugal block 55 is matched with the corresponding inclined surface A37 on the trigger block 36; a pressing rod B42 axially slides in a guide rail 43 on the rotating seat 31 along the rotating shaft C32; the tail end of the abutting rod B42 is provided with a step round block 41 which has the same central axis with the rotating shaft C32, the step round block 41 is in rotary fit with an abutting block 39 which axially slides in a sliding groove D38 in the trigger block 36, and a spring A40 which resets the abutting block 39 is arranged in the sliding groove D38; the housing 1 has a spring B44 therein which returns the pressing rod B42.

As shown in fig. 5, 6 and 7, a rotating shaft D45 perpendicular to the rotating shaft C32 is rotatably fitted on the rotating base 31, and a gear G46 mounted on the rotating shaft D45 is engaged with the teeth on the pressing rod B42; two rotating shafts E48 which correspond to the two n-shaped rods 25 one by one are rotatably matched on the rotating base 31, and two gears H47 arranged on the rotating shafts D45 are respectively meshed with gears I49 arranged on the corresponding side rotating shafts E48; the gear J50 mounted on the rotating shaft E48 is engaged with the arc-shaped rack 30 fixed to a corresponding one of the n-type rods 25 with the central axis of the swing pin 24 as the central axis. The arc-shaped toothed rack 30 ensures that it remains constantly engaged with the corresponding gear J50 when the n-shaped lever 25 swings about the pivot pin 24.

As shown in fig. 5, the spring a40 and the spring C57 are both compression springs; the spring B44 is an extension spring; one end of the spring B44 is connected with the inner wall of the shell 1, and the other end is connected with the end face of the pressing rod B42; as shown in fig. 6 and 7, the rack 30 slides in the guide sleeve 51 on the rotary seat 31. The guide bush 51 provides a guide rail 43 for the movement of the corresponding rack 30 to enhance the strength thereof, ensuring that the rack 30 does not depart from the corresponding gear J50.

As shown in fig. 1, the transmission ratio of the gear F35 to the gear E14 is greater than 1, so that the centrifugal wheel 52 is ensured to rotate rapidly during the descending and escaping process of an escaper fixed at one end of the lifting rope 17, and thus the two friction blocks 58 and the friction ring 59 in the centrifugal wheel 52 generate a large friction force, thereby effectively slowing the descending speed of the escaper and fully playing the function of the descent control device. As shown in fig. 5 and 6, the reference circle diameter ratio of the gear J50 to the corresponding gear I49 is smaller than 1, the transmission ratio of the gear I49 to the corresponding gear H47 is smaller than 1, and the reference circle diameter ratio of the gear H47 to the gear G46 is smaller than 1, so that when the lifting rope 17 is swung by hand by a small amplitude, the trigger block 36 can tightly press the friction block 58 against the friction ring 59 through the centrifugal block 55 and the spring C57, and the friction force between the friction block 58 and the friction ring 59 is instantly and effectively increased, so that the descending speed and the rotation speed of the ratchet wheel 22 are instantly slowed down, and the ratchet 27 on the n-shaped rod 25 is effectively matched with the ratchet wheel 22, and the quick and effective hovering in the air is realized.

The working process of the invention is as follows: in the initial state, the pressing wheel B18 tightly presses the lifting rope 17 against the grooves of the rims of the pressing wheel a16 and the pressing wheel B18, the two plate springs 60 are in the compressed state, the two legs of the n-shaped rod 25 are at the same distance from the center of the rotating shaft B15, the ratchets 27 on the two pressing plates 26 are not meshed with the corresponding ratchets 22, the two eccentric blocks 55 are pressed against the inclined surfaces a37 of the trigger block 36, and the two friction blocks 58 are pressed against the friction rings 59. Spring a40 and spring C57 are both in compression and spring B44 is in tension.

When the life-saving device needs to be used for escaping from a high place, the hanging ring 21 on the shell 1 is firmly fixed at a certain place in a room, so that the life-saving device can be in a suspended state. Pulling the lifting rope 17 to firmly fix one end of the lifting rope 17 at the waist of the escaper, and then the escaper jumps out of the window and moves downwards by the dead weight. In the descending process of the escaper, one end of the lifting rope 17 enables the shell 1 to swing at a certain angle due to the weight of the escaper, the acting point of the hanging ring 21 and one side of the lifting rope 17 for fixing the escaper are positioned on the same vertical line, and the n-shaped rod 25 cannot swing relative to the shell 1 under the action of the two plate springs 60.

In the descending process, the self weight of an escaper pulls the lifting rope 17 to move downwards, the lifting rope 17 drives the extrusion wheel A16 and the extrusion wheel B18 to rotate, the extrusion wheel A16 drives the coaxial gear E14 and the two ratchet wheels 22 to synchronously rotate through the rotating shaft B15, the gear E14 drives the rotating shaft A7 to rotate through the gear ring 13, the gear D12 and the gear C11, and the rotating shaft A7 drives the output shaft of the motor 10 to idle through the gear A8 and the gear B9. Meanwhile, the gear E14 drives the rotating shaft C32 to rotate at a faster speed through the gear F35, the rotating shaft C32 drives the centrifugal wheel 52 to rotate quickly, the two heavier centrifugal blocks 55 respectively press the corresponding friction blocks 58 against the inner wall of the friction ring 59 tightly by compressing the corresponding springs C57 under the centrifugal action, so as to increase the friction force between the friction blocks 58 and the friction ring 59, and further slow down the rotation of the centrifugal wheel 52, the centrifugal wheel 52 slows down the rotation of the extrusion wheel a16 through a series of transmissions, so that the pulling speed of the lifting rope 17 under the self-weight action of the escaper is slowed down, and the purpose of effectively slowing down the descending speed of the escaper is achieved.

When the escaper needs to reach the escape purpose in the shortest time, the escaper may stop descending at a certain safe place with a certain height and reach the place for temporary escape and evasion, at this time, the escaper only needs to hold the other side of the lifting rope 17 to swing towards one end of the lifting rope 17 fixing the waist, and the other side of the lifting rope 17 makes the two legs of the n-shaped rod 25 swing towards each other, so that the pressing plates 26 on the two legs of the n-shaped rod 25 respectively drive the corresponding ratchets 27 to mesh with the corresponding ratchets 22. In the process before the ratchet 27 on the abutting plate 26 is meshed with the corresponding ratchet 22, the rack 30 on the two branches of the n-type rod 25 respectively drives the rotating shaft D45 to rotate rapidly through the corresponding gear J50, the rotating shaft E48, the gear I49 and the gear H47, the rotating shaft D45 drives the abutting block 39 which is matched with the abutting rod B42 in a rotating manner through the gear G46 to further compress the spring a40 and drive the trigger block 36 to slide, the spring B44 is further stretched, the trigger block 36 drives the two centrifugal blocks 55 to respectively move rapidly towards the corresponding friction block 58 and finally to rapidly restrict the two centrifugal blocks 55 in the corresponding sliding grooves C34, the two centrifugal blocks 55 respectively further press the friction block 58 against the inner wall of the friction ring 59 through the further compressed spring C57, so that the friction between the friction block 58 and the friction ring 59 is further increased, the rotation of the centrifugal wheel 52 is further reduced, the rotation of the rotating shaft B15 is further reduced through a series of transmission, the rotation speed of the two ratchet wheels 22 is significantly reduced, and therefore, the effective meshing between the ratchet 27 on the abutting plate 26 and the corresponding ratchet 22 is facilitated.

The effective meshing of the ratchet 27 on the pressing plate 26 and the ratchet wheel 22 basically stops the rotation of the rotating shaft B15, so that the rotation of the pressing wheel A16 is stopped, the movement of the lifting rope 17 is stopped, and finally, the escaper hovers in the air at the required height and reaches the safety zone at the height orderly for emergency escape and danger avoidance.

When the escaper needs to descend continuously after hovering in the air, the engagement between the ratchet 27 on the pressing plate 26 and the ratchet 22 can be released only by loosening the other side of the lifting rope 17, so that the rotation limitation of the rotating shaft B15 and the rotating shaft C32 is released, then the n-shaped rod 25 swings and resets relative to the shell 1 under the resetting action of the plate spring 60, two branches of the n-shaped rod 25 respectively drive the pressing rod B42 to reset axially through a series of transmission, the trigger block 36 resets axially under the action of the spring a40, the two centrifugal blocks 55 reset under the resetting action of the corresponding springs C57, the abutting force of the two friction blocks 58 and the friction ring 59 is reduced, the limitation on the rotation of the centrifugal wheel 52 is released, and the escaper continues to descend slowly under the continuous action of the friction blocks 58 and the friction ring 59 in the centrifugal wheel 52.

When a person needs to lift from the ground to a certain height by using the invention, the motor 10 is started, the motor 10 drives the centrifugal wheel 52 to slowly rotate through the gear B9, the gear A8, the rotating shaft A7, the gear C11, the gear D12, the gear ring 13, the gear E14, the gear F35 and the rotating shaft C32, and the centrifugal wheel 52 does not generate large centrifugal force on the friction block 58 and the centrifugal block 55 due to the slow rotation, so that the friction force between the friction block 58 and the friction ring 59 does not greatly influence the rotation of the rotating shaft C32 and the rotating shaft B15, and the rotating shaft B15 drives the lifting rope 17 to move through the extrusion wheel A16 and lift the person from the ground to the high position.

In conclusion, the beneficial effects of the invention are as follows: the invention can freely and effectively control the falling height of the escaper by grabbing the lifting rope 17 at one side by hands, can realize hovering at a certain required height, and is easy to operate. Meanwhile, the automatic lifting device can automatically and effectively lift a rescuer upwards through the built-in motor 10, saves labor, and simultaneously improves the application range and the utilization rate of the descent control device by overcoming the limitation of the conventional descent control device.

Claims

1. The utility model provides an electrically regulated's ware that slowly falls which characterized in that: the device comprises a shell, a motor, a rotating shaft B, an extrusion wheel A, a lifting rope, an extrusion wheel B, a pressing rod A, a bolt, an n-shaped rod, a limiting wheel, a plate spring, a rotating shaft C, a centrifugal wheel, a centrifugal block, a friction block and a friction ring, wherein the rotating shaft B driven by the motor and a hollow rotating shaft C in transmission connection with the rotating shaft B are rotatably matched in the shell, and the lifting rope is arranged on the extrusion wheel A arranged on the rotating shaft B; a pressing wheel B for tightly pressing the lifting rope on the pressing wheel A is arranged at the tail end of a pressing rod A which vertically slides in a chute A at the top in the shell, and a bolt which is rotationally matched with the upper end of the pressing rod A is screwed in a threaded hole at the top of the chute A;

a centrifugal wheel arranged on the rotating shaft C is matched with a friction ring in the shell in a rotating way; friction blocks matched with the friction rings radially slide in the two sliding grooves E on the rim of the centrifugal wheel; an n-shaped rod is hinged in the shell through a swing pin, two plate springs for swinging and resetting the n-shaped rod are installed in the shell, and two branches of the n-shaped rod correspond to two branches of the lifting rope one by one; two limiting wheels for clamping one corresponding lifting rope are mounted at the tail ends of the two branches of the n-shaped rod;

the shell is internally provided with a structure which can prevent the rotating shaft B from rotating and increase the friction force between the friction block and the friction ring by manually swinging one lifting rope;

the top end of the shell is provided with a hanging ring for providing a fixed lifting point for the shell, and the bottom of the shell is provided with a movable groove convenient for the movement of a lifting rope; the upper end of the bolt is provided with an inner hexagonal groove matched with the hexagonal wrench; two ends of the rotating shaft B respectively rotate in the two circular grooves A on the shell; one end of the plate spring is connected with the inner wall of the shell, and the other end of the plate spring is connected with a corresponding one of the n-shaped rods;

a rotating shaft A is rotationally matched in a circular groove B on the shell, and a gear A arranged on the rotating shaft A is meshed with a gear B arranged on an output shaft of the motor; the gear C arranged on the rotating shaft A is meshed with three gears D arranged in the shell, the three gears D are meshed with a gear ring arranged in the shell, and the gear ring is meshed with a gear E arranged on the rotating shaft B; the gear E is meshed with a gear F arranged on the rotating shaft C;

two ratchet wheels are coaxially arranged on the rotating shaft B, and the directions of the two ratchet wheels which are limited to rotate are opposite; arc-shaped pressing plates which are in one-to-one correspondence with the ratchet wheels are arranged on the inner sides of the two branches of the n-shaped rod, and ratchets matched with the corresponding ratchet wheels are uniformly distributed on the inner sides of the pressing plates;

the rotating shaft C is rotationally matched with the rotary seat in the shell; a trigger block axially slides in a chute B on the inner wall of the rotating shaft C, two chutes C which are correspondingly communicated with chutes E on the centrifugal wheel one by one are arranged on the inner wall of the chute B, a centrifugal block radially slides in each chute C, and each centrifugal block is connected with a corresponding friction block through a spring C; the inclined plane B of the end surface of the centrifugal block is matched with the corresponding inclined plane A on the trigger block; a pressing rod B axially slides in the guide rail on the rotary seat along the rotating shaft C; the tail end of the abutting rod B is provided with a stepped round block which has the same central axis with the rotating shaft C, the stepped round block is in rotary fit with an abutting block which axially slides in a sliding chute D in the trigger block, and a spring A for resetting the abutting block is arranged in the sliding chute D; a spring B for resetting the abutting pressure rod B is arranged in the shell;

a rotating shaft D perpendicular to the rotating shaft C is rotatably matched on the rotating seat, and a gear G arranged on the rotating shaft D is meshed with teeth on the abutting rod B; two rotating shafts E which correspond to the two n-shaped rods one by one are rotatably matched on the rotating seat, and two gears H arranged on the rotating shafts D are respectively meshed with gears I arranged on the corresponding side rotating shafts E; the gear J arranged on the rotating shaft E is meshed with an arc-shaped rack which is fixed on a corresponding branch of the n-shaped rod and takes the central axis of the swing pin as the central axis.

2. An electrically regulated descent control device according to claim 1, wherein: the spring A and the spring C are both compression springs; the spring B is an extension spring; one end of the spring B is connected with the inner wall of the shell, and the other end of the spring B is connected with the end face of the compression bar B; the rack slides in the guide sleeve on the rotary seat.

3. An electrically regulated descent control device according to claim 1, wherein: the transmission ratio of the gear F to the gear E is greater than 1; the reference diameter ratio of the gear J to the corresponding gear I is less than 1, the transmission ratio of the gear I to the corresponding gear H is less than 1, and the reference diameter ratio of the gear H to the gear G is less than 1.