CN114100014A

CN114100014A - Four-claw centrifugal body rolling impact type descent control device damping device

Info

Publication number: CN114100014A
Application number: CN202111482353.6A
Authority: CN
Inventors: 周振雄; 宋在勇; 齐伟; 吕雪寒
Original assignee: Beihua University
Current assignee: Beihua University
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-03-01
Anticipated expiration: 2041-12-07
Also published as: CN114100014B

Abstract

The utility model provides a four-jaw centrifuge rolls striking formula and slowly falls ware damping device, relate to high altitude lifesaving and slowly fall the ware field, for overcoming striking formula damping device atress unreasonable, easily destroy, drawbacks such as cost height, adopt the middle four-jaw centrifuge that is oval, both ends all have two claws of Y shape, its center is equipped with the pivot, the both ends of this pivot and the U-shaped opening movable assembly of 2 driving-discs, be equipped with the bead circle of inner ring shape on the internal circle face of box, when the driving-disc promoted the four-jaw centrifuge and rolls on the bead circle under the drive of speedup mechanism, the four-jaw centrifuge constantly collides with the bead, its focus constantly fluctuates and changes. By means of centrifugal force, the rotating shafts of the four-claw centrifugal bodies generate reverse thrust on the U-shaped openings of the driving discs, and accordingly the damping effect is achieved. The device has reasonable stress, is not easy to damage, has simple structure and low manufacturing cost, and particularly can obviously enhance the safety and stability of the descent control device.

Description

Four-claw centrifugal body rolling impact type descent control device damping device

Technical Field

The invention relates to a high-altitude lifesaving slow descending device, in particular to a four-claw centrifugal body rolling impact type slow descending device damping device.

Background

The high-altitude lifesaving slow descending device in the prior art is mainly divided into two types, one type is a friction type, namely, the rotating speed is limited through the friction force between a centrifugal body rotating at a high speed and the inner circular surface of a box body, so that the purpose of slow descending at a constant speed is achieved. The device has the following two main advantages that firstly, the structure is simple, and the manufacturing cost is low; and secondly, the bearing is stable, no impact force exists, and the phenomenon of accidental damage is not easy to occur. On one hand, because the friction coefficient between two metal materials is generally small, after the friction generates heat, the metal surface layer property of the friction material is changed, the hardness is reduced, the friction coefficient is reduced, the damping effect is reduced, and even the slow-falling effect is ineffective. Some descent control devices have larger size and mainly enhance the damping effect, and have the defects of more material consumption, heavy weight and higher cost. The friction type damping device has another problem that once media such as water, oil and the like enter between the friction pairs, the friction coefficient is rapidly reduced, the damping effect is greatly reduced, and even the slow-descending effect is failed.

Another type of high altitude lifesaving slow descending device is an impact type, and the damping effect of the high altitude lifesaving slow descending device mainly comes from continuous impact between running parts or between the running parts and a fixed part without stopping and friction. The most important advantage is that the defect that the damping effect is seriously influenced when media such as water, oil and the like enter a friction pair of the descent control device is overcome. At present, a plurality of inventions and technologies are available in the prior art, and the essence of the inventions and technologies is that impact type damping devices are different only in structure.

All impact dampers involve both safety and stability problems and cost problems. In the aspect of safety stability, the problems of abrasion and damage of components caused by impact mainly exist, wherein the damage of the components is mainly caused by that metal materials reach the fatigue limit strength due to the impact or are subjected to overlarge instantaneous impact force and unreasonable stress. The cost problem is mainly that the cost is greatly increased by selecting special materials for preventing the damage of the parts, the material selection problem of the parts directly participating in the impact is not only related, and the anti-damage strength and the anti-fatigue strength of other related transmission parts are required to be improved.

For example, a damping device of a planet-running impact type descent control device (patent No. ZL 201811293808.8) provides better design thought and expected effect. As described above, there is a problem that a special material is required to be selected to prevent the damage of the parts, and the machining accuracy is improved, which leads to a high cost. The centrifugal block is mainly characterized in that impact force borne by the centrifugal block is transmitted to the sliding groove, the sliding groove is transmitted to the pinion and finally transmitted to the gear shaft, only one end of the gear shaft is fixed on the linkage disc and belongs to a cantilever beam type structure, the impact force borne by the gear shaft is generated at the end of the gear shaft, the stress is unreasonable, and the requirements on materials, machining precision and installation strength are high.

Disclosure of Invention

The invention provides a four-claw centrifugal body rolling impact type descent control device, aiming at overcoming the defects of an impact type damping device, the device mainly pushes the four-claw centrifugal body with a special structural shape to roll and collide on a convex edge ring through a driving disc, and the gravity center of the four-claw centrifugal body continuously fluctuates and changes, so that the damping effect is achieved.

The invention adopts the following technical scheme:

the utility model provides a four-jaw centrifuge rolls striking formula and slowly falls ware damping device, includes box body, rope sheave, acceleration rate mechanism and driving-disc, and the rope sheave passes through acceleration rate mechanism and drives the driving-disc rotation, and the driving-disc promotes a plurality of centrifuge again and is circular motion, characterized by: the device is provided with 2 driving disks in a disc shape, a plurality of U-shaped openings which are uniformly distributed according to the circumference are arranged at the edges of the two driving disks along the radial direction and are aligned one by one in the axial direction, the middle of each centrifugal body is in an oval shape, two symmetrical claws in a Y shape are arranged at two ends, namely, the whole body is a four-claw centrifugal body, the center of each centrifugal body is provided with a rotating shaft, the rotating shaft protrudes out of two side surfaces of the four-claw centrifugal body, the protruding parts are movably assembled in a pair of U-shaped openings of the two driving disks, namely, the four-claw centrifugal body is positioned between the 2 driving disks, an inner circle surface of a box body is correspondingly provided with an inner ring-shaped convex rib ring, the convex rib ring is provided with uniformly distributed convex ribs, when the driving disks push the four-claw centrifugal body to roll along the convex rib ring, the four-claw centrifugal body continuously collides with the convex ribs, the rotating shaft slides in the U-shaped openings of the driving disks in a reciprocating manner and generates reverse thrust to the U-shaped openings, so as to further to enable the rope pulley to rotate at a uniform speed, the human body or the heavy object falls at a constant speed.

The four-claw centrifugal body has the advantages that the length is large, the width is small, the four claws are concentrated at two ends, the two claws at each end are in a symmetrical Y shape, the purpose is to enable the four-claw centrifugal body to be under the action of centrifugal force, one claw can be meshed with the convex rib in time to generate impact, the gravity center (namely the central line of the rotating shaft) of the four-claw centrifugal body is closer to the convex rib ring, the included angle of the impact force of the received convex rib relative to the U-shaped opening of the driving disc is maximized, enough reverse thrust to the U-shaped opening is formed, the amplitude of fluctuation change of the gravity center of the four-claw centrifugal body is maximized, and the damping effect is more obvious and effective.

The working principle is as follows: the damping device is easy to start because the centrifugal force of the four-jaw centrifugal body is small and the damping effect is small when the damping device is just started. Along with the increase of the rotating speed of the driving disc, the centrifugal force of the four-jaw centrifugal body is increased, the gravity center of the four-jaw centrifugal body, namely the central line of the rotating shaft, is moved from the outer end to the inner end of the U-shaped opening, the required work (namely energy consumption) is increased, so that the damping effect of the four-jaw centrifugal body on the driving disc is increased, and finally, the driving disc and the rope pulley rotate at a constant speed, and a human body or a heavy object falls at a constant speed.

When the driving disk rotates reversely, the two claws of the Y shape are symmetrical, so the function of the damping device is completely the same.

Furthermore, each four-claw centrifugal body can also be composed of two identical four-claw centrifugal bodies which are arranged at a certain distance, a rotating shaft is arranged on the central line between the two four-claw centrifugal bodies, only 1 driving disc is adopted, and the U-shaped opening of the driving disc rides on the rotating shaft between the two four-claw centrifugal bodies.

The invention has the beneficial effects that: the four-claw centrifugal body rolling impact type descent control device has the advantages that the damping device of the descent control device keeps the performance characteristics of oil resistance and water resistance, the whole stress is more reasonable, the parts are not easy to damage, the safety stability of the descent control device is obviously improved, the service life of the descent control device is obviously prolonged, the structure is simple, and the manufacturing cost can be greatly reduced.

The invention is further described below with reference to fig. 1 to 9.

Drawings

FIG. 1: the four-claw centrifugal body rolling impact type descent control device is structurally schematic;

FIG. 2: view A-A of FIG. 1;

FIG. 3: a schematic view of a drive plate;

FIG. 4: a four-jaw centrifuge front view;

FIG. 5: FIG. 4 is a top view;

FIG. 6: schematic diagram of damping device when 1 driving disc is adopted;

FIG. 7: a four-jaw centrifuge front view when 1 drive disk is employed;

FIG. 8: FIG. 7 is a top view;

FIG. 9: schematic diagram of the separator.

In each figure: the device comprises a box body 1, a rope pulley 2, an inner gear ring 3, a planetary gear 4, a central gear 5, a rib ring 6, ribs 7, a driving disc 8, a U-shaped opening 9, a four-claw centrifugal body 10, a rotating shaft 11 and a partition plate 12.

Embodiment mode 1:

fig. 1 and 2 are schematic structural views of a four-jaw centrifugal body rolling impact type descent control device (hereinafter referred to as a damping device) provided by the invention. The damping device comprises a box body 1, a rope pulley 2, an inner gear ring 3, a planetary gear 4, a central gear 5, a

rib ring

6, 2 driving disks 8 and 4 four-claw centrifugal bodies 10. The inner gear ring, the planetary gear and the central gear form a speed increasing mechanism, and a gear shaft of the planetary gear is installed on the rope pulley to finally enable the central gear at the transmission tail end to rotate at a high speed. The centers of the 2 driving disks are all in the shape of an internal gear ring and are assembled with the central gear to synchronously rotate.

The bead ring 6 is arranged on the inner circular surface of the box body 1, is in the shape of an inner gear ring, and is provided with evenly distributed beads 7. The convex edge ring is manufactured independently and then is fixedly assembled with the box body through screws.

As shown in fig. 2 and 3, each of the 2 driving disks 8 is disk-shaped, and 4U-shaped openings 9 are uniformly distributed on the edge of the disk and are aligned in the axial direction.

As shown in fig. 4 and 5, the middle of each four-jaw centrifuge 10 is oval, and two symmetrical jaws in a Y shape are respectively arranged at two ends of the four-jaw centrifuge. The center of the four-jaw centrifuge 10 is provided with a rotating shaft 11, two ends of the rotating shaft protrude out of two side surfaces of the four-jaw centrifuge, and the protruding parts are movably assembled in a pair of U-shaped openings 9 of 2 driving disks 8, namely, the four-jaw centrifuge is positioned between the two driving disks and can slide in the U-shaped openings in a reciprocating manner.

When the four-jaw centrifuge 10 and the rotating shaft 11 are integrated, the diameters of the two ends of the rotating shaft are the same, and the widths of the U-shaped openings of the two driving disks 8 are also the same. When the four-jaw centrifuge 10 and the rotating shaft 11 are assembled, in order to prevent the rotating shaft from sliding out to the inner side and colliding and contacting with the planetary gear 4 to seriously affect the normal operation, the rotating shaft 11 is in a stepped shaft shape, the diameter of the outer end of the rotating shaft is larger, and the width of the U-shaped opening of the driving disc corresponding to the outer side is larger than that of the U-shaped opening of the driving disc at the inner side. Meanwhile, in any case, the inner edge of the driving disc at the inner side is required to be in movable contact with the side face of the inner gear ring 3, namely, the side face of the inner gear ring plays a limiting role, and the driving disc at the inner side and the end of the rotating shaft are prevented from being in collision contact with the planetary gear 4.

The working principle is as follows: the driving disk drives the four-claw centrifugal body to roll forwards along the convex rib ring to continuously collide with the convex rib, and the gravity center of the four-claw centrifugal body continuously fluctuates, so that the rotating shaft of the four-claw centrifugal body generates reverse thrust to the U-shaped opening of the driving disk, the rope wheel rotates at a constant speed, and a human body or a heavy object falls at a constant speed.

In the present embodiment, the four-jaw centrifuge 10 always collides with the next rib every 2 ribs when rolling, i.e., 1 impact occurs every 3 ribs. In particular, when the number of ribs 7 is not an integer multiple of 3, the ribs participating in the collision change over to the next one every revolution of the drive disc 6, so that the number of times each rib participates in the collision is the same. When the drive disk rotates in the opposite direction, the overall wear is balanced, since the two jaws of the Y are symmetrical and the function of the damping device is unchanged. In this embodiment, the number of ribs in fig. 1 is 18, which is an integral multiple of 3, and the purpose is to visually reflect the operation characteristics and to facilitate the calculation.

In the present embodiment, the rotation speed ratio of the sheave and the sun gear is 1: 4, the central gear and the driving disk rotate for 4 circles every time the rope wheel rotates for one circle. Each four-jaw centrifuge hit the ribs 6 times per 1 revolution of the drive disc (18 ribs in this embodiment). The circumference was 14.44cm, calculated as the diameter of 4.6cm where the sheave was wrapped around the wire rope. If the falling speed of a human body or a heavy object is 100 cm/s, the rotating speed of the rope wheel is 6.94 r/s, and the total number of times of mutual impact between the 4 four-claw centrifugal bodies and the convex ribs is as follows: 6.94 × 4 × 6=666.24 times/sec, so a very good damping effect is achieved: under the condition that the slow descent speed is unchanged, the higher the impact frequency is, the less damping energy consumption is required by single impact, the smaller the impact force borne by a part is, the better the safety and stability of the slow descent device are, and the longer the service life of the slow descent device is.

Embodiment mode 2:

as shown in fig. 6, in addition to embodiment 1, only 1 drive disc 8 is used, and 1 disk-shaped partition plate 12 is added (as shown in fig. 9). Meanwhile, as shown in fig. 7 and 8, each four-jaw centrifuge body is composed of two identical four-jaw centrifuge bodies which are spaced apart by a certain distance, a rotating shaft is arranged on the central line between the two four-jaw centrifuge bodies, and the U-shaped opening 9 of the driving disk 8 rides on the rotating shaft between the two four-jaw centrifuge bodies.

In the present embodiment, the partition plate 12 is located between the four-jaw centrifuge 10 and the speed increasing mechanism, and the inner side edge of the partition plate 12 is in movable contact with the side surface of the ring gear 3 in order to prevent mutual collision and interference. Because the four-claw centrifugal body is of an integrated structure, the number of the driving discs is only 1, and the four-claw centrifugal body is convenient to assemble.

In this embodiment, two identical four-jaw centrifuges and a rotating shaft can be combined, but 2 four-jaw centrifuges are not deflected relatively. At the moment, two ends of the rotating shaft are arranged into a square column shape or an oblate shape, the middle of the rotating shaft is still cylindrical, and the centers of the 2 four-claw centrifugal bodies are correspondingly arranged into square holes or long round holes to be assembled with the two ends of the rotating shaft.

Claims

1. The utility model provides a four-jaw centrifuge rolls striking formula and slowly falls ware damping device, includes box body, rope sheave, acceleration rate mechanism and driving-disc, and the rope sheave passes through acceleration rate mechanism and drives the driving-disc rotation, and the driving-disc promotes a plurality of centrifuge again and is circular motion, characterized by: the device is provided with 2 driving disks in a disc shape, a plurality of U-shaped openings which are uniformly distributed according to the circumference are arranged at the edges of the two driving disks along the radial direction and are aligned one by one in the axial direction, the middle of each centrifugal body is in an oval shape, two symmetrical claws in a Y shape are arranged at two ends, namely, the whole body is a four-claw centrifugal body, the center of each centrifugal body is provided with a rotating shaft, the rotating shaft protrudes out of two side surfaces of the four-claw centrifugal body, the protruding parts are movably assembled in a pair of U-shaped openings of the two driving disks, namely, the four-claw centrifugal body is positioned between the 2 driving disks, an inner circle surface of a box body is correspondingly provided with an inner ring-shaped convex rib ring, the convex rib ring is provided with uniformly distributed convex ribs, when the driving disks push the four-claw centrifugal body to roll along the convex rib ring, the four-claw centrifugal body continuously collides with the convex ribs, the rotating shaft slides in the U-shaped openings of the driving disks in a reciprocating manner and generates reverse thrust to the U-shaped openings, so as to further to enable the rope pulley to rotate at a uniform speed, the human body or the heavy object falls at a constant speed.

2. The four-jaw centrifugal body rolling impact type descent control device as claimed in claim 1, wherein: each four-claw centrifugal body can also be composed of two identical four-claw centrifugal bodies which are separated by a certain distance, a rotating shaft is arranged on the central line between the two four-claw centrifugal bodies, only 1 driving disc is adopted, and the U-shaped opening of the driving disc rides on the rotating shaft between the two four-claw centrifugal bodies.