Double-cycloid speed-reducing and slow-descending equipment

Abstract

The utility model discloses double-cycloid speed-reducing and slow-descending equipment which comprises a front panel and a rear panel. The end, close to the main panel, of the transmission shaft assembly is connected with a constant-speed assembly, and the end, close to the back panel, of the transmission shaft assembly is connected with a braking assembly. The roller assembly comprises a roller, and a rope loop is wound on the roller. The constant-speed assembly comprises a damping block which abuts against the inner wall of the roller when the roller rolls, the transmission shaft assembly is in transmission connection with the roller through a cycloidal-pin wheel transmission mechanism and comprises a transmission shaft, an input bearing, a pair of guide pipes and push rods, the guide pipes and the push rods are connected to the upper end and the lower end of the transmission shaft, and the top ends of the push rods are connected with the damping block. The emergency escape device is smaller in size and weight, stable in performance, uniform in stress, capable of effectively controlling the falling speed, more convenient to use, safer and more reliable, and the emergency escape efficiency is improved. The braking device is of a hydraulic structure, a user does not need to provide continuous and large braking force, and equipment braking is more sensitive and saves more labor.

Description

Technical Field

[0001] The utility model relates to the technical field of descenders, and particularly relates to a double cycloid deceleration descender device. Background Art

[0002] Descender devices mainly use centrifugal devices to offset the acceleration generated by a user falling from a high place, so as to control the falling speed. To maintain stable circular motion of an object, centripetal force needs to be provided. The magnitude of the centripetal force is positively correlated with the mass of the rotating object, the angular velocity of circular motion, and the radius of the circular motion orbit. The constant speed device in the descender device utilizes the centrifugal characteristics of circular motion to associate the speed of the damping block with the friction force it receives. When the speed of the damping block in circular motion reaches a certain threshold, due to the influence of the centripetal force, the resistance generated by the friction between the damping block and the inner surface of the rope loop balances the gravity of the user, achieving a constant speed of the descender device.

[0003] The existing design scheme of the descender transmits the linear velocity of the large gear ring to the small gear through the meshing between gears (spur gears or helical gears). This scheme is greatly limited by the space and volume of the device, and the planetary gear transmission has a relatively large load on a single tooth during the load transmission process. Therefore, this structure has relatively high requirements for the strength of the gears. Summary of the Utility Model

[0004] To solve the technical problems mentioned in the background art, the utility model provides a double cycloid deceleration descender device.

[0005] The utility model adopts the following technical scheme: A double cycloid deceleration and descent device, comprising a front panel and a rear panel; a drum assembly is connected between the front panel and the rear panel through a transmission shaft assembly; a constant speed assembly is connected to one end of the transmission shaft assembly close to the main panel, and a braking assembly is connected to one end close to the back panel; the drum assembly includes a drum, and a rope loop is wound around the drum; the constant speed assembly includes a damping block; the damping block abuts against the inner wall of the drum when the drum rolls; the transmission shaft assembly is in transmission connection with the drum through a cycloid pinwheel transmission mechanism; the transmission shaft assembly includes a transmission shaft, an input bearing, a pair of conduits and push rods connected to the upper and lower ends of the transmission shaft; the tops of a pair of the push rods are connected to the damping block; the cycloid pinwheel transmission mechanism includes a pinwheel disc, a pinwheel assembly, a first cycloid wheel, a second cycloid wheel, an eccentric bearing and a needle roller assembly; the pinwheel disc is connected to one end face of the drum close to the front panel and just covers the face; a pinwheel flange is arranged at the center of the pinwheel disc; the pinwheel flange is provided with the pinwheel assembly; the pinwheel assembly includes a plurality of pinwheel shafts and pinwheel sleeves symmetrically arranged on the circular disc surface of the pinwheel flange; the pinwheel sleeves are sequentially inserted into the pinwheel holes of the first cycloid wheel and the second cycloid wheel; the outer peripheral teeth numbers of the first cycloid wheel and the second cycloid wheel are the same and the phase differences of the positions of the pinwheel holes are distributed at 180°; the needle roller assembly includes a stabilizing ring, a plurality of needle roller shafts symmetrically arranged at one end on the inner circumference of the stabilizing ring and fixed at the center of the front panel at the other end, and a needle roller sleeve sleeved on the plurality of needle roller shafts; the number of the needle roller sleeves is 1 more than the outer peripheral teeth numbers of the first cycloid wheel and the second cycloid wheel; the first cycloid wheel and the second cycloid wheel are arranged in the rotation space surrounded by the needle roller assembly, and the outer contours are in tangential fit with the needle roller sleeve;

[0006] When the rope loop drives the drum to rotate, the pinwheel assembly synchronously drives the first cycloid wheel and the second cycloid wheel to perform planetary rotation in fit with the needle roller sleeve; the eccentric bearing is sequentially connected to the center circles of the first cycloid wheel and the second cycloid wheel; the transmission shaft sequentially passes through the center holes of the input bearing and the pinwheel flange and is rotationally connected to the eccentric bearing; the first cycloid wheel and the second cycloid wheel drive the eccentric bearing to perform reverse circular motion, thereby driving the damping block on the transmission shaft to rotate reversely relative to the drum.

[0007] Further, the braking assembly includes a piston rod, a spring, a hydraulic oil pipe joint, a hydraulic oil pipe, a steering head, a sealing ring and a bearing; the output end of the piston rod is inserted into the transmission shaft through the spring and is used for supplying pressure into the transmission shaft to push the push rod to jack up the damping block, so that the damping block is tightly attached to the inner wall of the drum; the input end of the piston rod is fixedly connected to the outside of the rear panel through the bearing; the other end of the bearing is connected to the steering head; a locking nut is vertically arranged at the top of the steering head; a hydraulic oil pipe is connected to the locking nut; an olive sleeve, an oil needle and a gasket are arranged between the hydraulic oil pipe and the steering head.

[0008] Further, an oil passing screw is connected to one side of the steering head.

[0009] Compared with the prior art, the advantages of the present utility model are as follows: For the double cycloid deceleration and descent device designed by the present utility model, the constant speed component adopts a double cycloid pinwheel structure. The two cycloid wheels have the same contour and the phase difference of the pinwheel holes is 180°. When operating, it can ensure relatively stable and balanced force. The transmission shaft is connected to the damping block through a conduit and a push rod. The damping block makes a high-speed circular motion in the direction opposite to the movement direction of the drum along with the transmission shaft, generating frictional resistance between the damping block and the inner wall of the drum, hindering the rotation of the drum. When the frictional resistance is balanced with the user's gravity, the uniform descent of the descent device can be achieved. This device is smaller in volume and weight, has stable performance and uniform force, can effectively control the falling speed, is more portable, safe and reliable, and improves the emergency escape efficiency. The braking device adopts a hydraulic structure, which does not require the user to provide continuous and large braking force, making the device braking more sensitive and labor-saving. Description of the Drawings

[0010] Figure 1 It is an exploded structural schematic diagram of the double cycloid deceleration and descent device of the present utility model;

[0011] Figure 2 It is a schematic diagram of the partial connection relationship of the double cycloid deceleration and descent device of the present utility model;

[0012] Figure 3 It is an overall structural schematic diagram of the cycloid pinwheel transmission mechanism of the present utility model;

[0013] Figure 4 It is a cross-sectional view of the braking component of the present utility model.

[0014] Wherein:

[0015] 1 - front panel, 2 - rear panel, 3 - drum, 4 - damping block, 5 - transmission shaft, 6 - input bearing, 7 - push rod, 8 - pinwheel disc, 9 - first cycloid wheel, 10 - second cycloid wheel, 11 - eccentric bearing, 12 - pinwheel flange, 13 - pinwheel shaft, 14 - pinwheel sleeve, 15 - stabilizing ring, 16 - needle roller shaft, 17 - needle roller sleeve, 18 - piston rod, 19 - spring, 20 - hydraulic oil pipe, 21 - steering head, 22 - sealing ring, 23 - bearing, 24 - locking nut, 25 - olive sleeve, 26 - oil needle, 27 - gasket, 28 - oil passing screw, 29 - conduit. Detailed Embodiment

[0016] Hereinafter, for the convenience of those skilled in the art to understand the technical solution of the present utility model, further description will be made with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and not intended to limit the scope of the present utility model.

[0017] In the following detailed description, for the sake of explanation, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present utility model. However, it is obvious that one or more embodiments can also be implemented without these specific details. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0018] As Figure 1-2 shown, the double cycloid deceleration and descent device designed by the present utility model includes a front panel 1 and a rear panel 2; a drum assembly is connected between the front panel 1 and the rear panel 2 through a transmission shaft assembly. A constant speed assembly is connected to one end of the transmission shaft assembly close to the front panel 1, and a braking assembly is connected to one end close to the rear panel 2. The drum assembly includes a drum 3, and a rope loop is wound around the drum 3. The constant speed assembly includes a damping block 4 for weakening the kinetic energy generated during the descent process. The damping block 4 abuts against the inner wall of the drum 3 when the drum 3 rolls. The transmission shaft assembly is in transmission connection with the drum 3 through a cycloid pinwheel transmission mechanism. The transmission shaft assembly includes a transmission shaft 5, an input bearing 6, a pair of guide pipes 29 connected to the upper and lower ends of the transmission shaft 5, and a push rod 7 arranged in the guide pipes 29. The tops of a pair of push rods 7 are connected to the damping block 4.

[0019] Please refer to Figure 1-3 shown, the cycloid pinwheel transmission mechanism includes a pinwheel disc 8, a pinwheel assembly, a first cycloid wheel 9, a second cycloid wheel 10, an eccentric bearing 11, and a needle roller assembly. The pinwheel disc 8 is connected to one end face of the drum 3 close to the front panel 1 and just covers this face. A pinwheel flange 12 is provided at the center of the pinwheel disc 8. A pinwheel assembly is provided on the pinwheel flange 12. The pinwheel assembly includes a plurality of pinwheel shafts 13 and pinwheel sleeves 14 symmetrically arranged on the circular disc surface of the pinwheel flange 12. The pinwheel sleeves 14 are sequentially inserted into the pinwheel holes of the first cycloid wheel 9 and the second cycloid wheel 10. The outer peripheral teeth numbers of the first cycloid wheel 9 and the second cycloid wheel 10 are the same, and the phase differences of the positions of the pinwheel holes are distributed at 180°. The needle roller assembly includes a stabilizing ring 15 for stabilizing the relative positions of the needle roller shafts, a plurality of needle roller shafts 16 with one end symmetrically arranged on the inner circumference of the stabilizing ring 15 and the other end fixedly arranged at the center of the front panel 1, and a needle roller sleeve 17 sleeved on the plurality of needle roller shafts 16. The number of the needle roller sleeves 17 is one more than the outer peripheral teeth numbers of the first cycloid wheel 9 and the second cycloid wheel 10. The first cycloid wheel 9 and the second cycloid wheel 10 are arranged in the rotating space surrounded by the needle roller assembly, and the outer contours are in tangential fit with the needle roller sleeve 17.

[0020] Driven by the pinwheel assembly, the first cycloid gear 9 and the second cycloid gear 10 rotate within the trajectory range jointly constrained by the eccentric bearing 11 and the needle roller assembly, amplifying the rotation of the pinwheel assembly and outputting it as the rotation of the transmission shaft 5. During the rotation, the radial forces of the two cycloid gears on the transmission shaft are equal in magnitude and opposite in direction, which can cancel each other out, thus improving the stability of the transmission process. Specifically, when the rope loop drives the drum 3 to rotate, the pinwheel assembly synchronously drives the first cycloid gear 9 and the second cycloid gear 10 to perform planetary rotation in contact with the needle roller sleeve 17. The eccentric bearing 11 is sequentially connected to the center circles of the first cycloid gear 9 and the second cycloid gear 10. The transmission shaft 5 sequentially passes through the center holes of the input bearing 6 and the pinwheel flange 12 and is rotationally connected to the eccentric bearing 11. The first cycloid gear 9 and the second cycloid gear 10 drive the eccentric bearing 11 to perform a reverse circular motion, thereby driving the damping block 4 on the transmission shaft 5 to rotate in the opposite direction relative to the drum 3.

[0021] When the descent device involved in this embodiment is working, the drum 3 transmits the circular motion to the cycloid gear through the pinwheel assembly. Due to the influence of the eccentric bearing and the cycloid gear, the rotational motion output by the transmission shaft is opposite to the rotational motion input by the pinwheel assembly, and the output rotational speed is the input rotational speed * (number of roller sleeves - 1). The drum 3 and the damping block 4 each output a frictional force opposite to their motion directions, hindering the motion of the drum 3. As the speed of the drum 3 increases, the centripetal force of the circular motion of the damping block 4 becomes larger and larger, and the generated frictional resistance also becomes larger and larger. When the frictional resistance balances the user's gravity, the descent device realizes a uniform descent.

[0022] As Figure 4 shown, the braking device involved in this embodiment adopts a hydraulic structure, including a piston rod 18, a spring 19 for controlling the return of the piston rod 18, a hydraulic oil pipe joint, a hydraulic oil pipe 20, a swivel head 21, a sealing ring 22, and a bearing 23. The output end of the piston rod 18 is inserted into the transmission shaft 5 through the spring 19. The hydraulic oil pushes the piston rod 18 downward, and the piston rod 18 pushes the push rod 7 outward and supplies pressure into the transmission shaft 5 and the conduit 29 to push the push rod 7 to lift the damping block 4, so that the damping block closely adheres to the inner wall of the drum, causing the rotation speed of the drum to decrease until it stops. The input end of the piston rod 18 is fixedly connected to the outside of the rear panel 2 through the bearing 23, and the other end of the bearing 23 is connected to the swivel head 21. The bearing 23, the transmission shaft 5, the sealing ring 22, and the rear panel 2 form a closed oil circuit. A lock nut 24 is vertically arranged at the top of the swivel head 21, and an oil passing screw 28 is connected to one side of the swivel head 21. The lock nut 24 is connected to the hydraulic oil pipe 20, and an olive sleeve 25, an oil needle 26, and a gasket 27 are arranged between the hydraulic oil pipe 20 and the swivel head 21. By tightening the lock nut 24, the olive sleeve 25 is deformed, and the olive sleeve 25 and the oil needle 26 together clamp the hydraulic oil pipe 20 to achieve the sealing at the joint. Specifically, the end of the hydraulic oil pipe 20 can be connected to a brake handle, and pressing the brake handle can brake the device.

[0023] In summary, for the double cycloid speed reduction and descent device designed by the present utility model, the constant speed component adopts a double cycloid pinwheel structure. The two cycloid wheels have the same contour and a phase difference of 180° in the pinwheel holes, which can ensure relatively stable and balanced force during operation. The transmission shaft is connected to the damping block through a conduit and a push rod. The damping block makes a high-speed circular motion in the direction opposite to the motion direction of the drum along with the transmission shaft, generating frictional resistance with the inner wall of the drum and hindering the rotation of the drum. When the frictional resistance balances the user's gravity, the uniform descent of the descent device can be achieved. This device is smaller in volume and weight, has stable performance and uniform force, can effectively control the falling speed, is more portable, safe and reliable, and improves the emergency escape efficiency. The braking device adopts a hydraulic structure, which does not require the user to provide continuous and large braking force, making the device braking more sensitive and labor-saving.

[0024] The above embodiments are only used to describe the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. A double cycloid deceleration and descent device, characterized in that, The invention comprises a front panel (1) and a rear panel (2); a roller assembly is connected between the front panel (1) and the rear panel (2) via a transmission shaft assembly; the end of the transmission shaft assembly close to the front panel (1) is connected to a constant speed assembly, and the end close to the rear panel (2) is connected to a brake assembly; the roller assembly comprises a roller (3), and a rope loop is wound around the roller (3); the constant speed assembly comprises a damping block (4); the damping block (4) abuts against the inner wall of the roller (3) when the roller (3) rolls; the transmission shaft assembly is driven by a cycloidal pinwheel transmission mechanism The transmission shaft assembly comprises a transmission shaft (5), an input bearing (6), a pair of guide tubes (29) connected to the upper and lower ends of the transmission shaft (5), and a push rod (7); the top ends of the pair of push rods (7) are connected to the damping block (4); the cycloid pinwheel transmission mechanism comprises a pinwheel disc (8), a pinwheel assembly, a first cycloid wheel (9), a second cycloid wheel (10), an eccentric bearing (11) and a needle roller assembly; the pinwheel disc (8) is connected to an end surface of the drum (3) close to the front panel (1) and just connects the front panel (1) to the eccentric bearing (11). The surfaces are covered; a pinwheel flange (12) is arranged at the center of the pinwheel disk (8); a pinwheel assembly is arranged on the pinwheel flange (12); the pinwheel assembly comprises a plurality of pinwheel shafts (13) and pinwheel sleeves (14) symmetrically arranged on the circular disk surface of the pinwheel flange (12); the pinwheel sleeves (14) are sequentially inserted into the pinwheel holes of the first cycloidal wheel (9) and the second cycloidal wheel (10); the first cycloidal wheel (9) and the second cycloidal wheel (10) have the same number of outer peripheral teeth and the pinwheel hole positions are distributed with a phase difference of 180°; the needle roller assembly The component comprises a stabilizing ring (15), a plurality of needle roller shafts (16) one end of which is symmetrically arranged on the inner circumference of the stabilizing ring (15) and the other end of which is fixedly arranged at the center of the front panel (1), and a needle roller sleeve (17) sleeved on the plurality of needle roller shafts (16); the number of the needle roller sleeves (17) is one more than the number of teeth on the outer circumference of the first cycloidal wheel (9) and the second cycloidal wheel (10); the first cycloidal wheel (9) and the second cycloidal wheel (10) are arranged in a rotating space surrounded by the needle roller assembly, and the outer contours are tangent to the needle roller sleeve (17); When the rope loop drives the drum (3) to rotate, the pinwheel assembly synchronously drives the first cycloid wheel (9) and the second cycloid wheel (10) to fit the needle sleeve (17) to perform planetary rotation; the eccentric bearing (11) is sequentially connected to the center circles of the first cycloid wheel (9) and the second cycloid wheel (10); the transmission shaft (5) passes through the center holes of the input bearing (6) and the pinwheel flange (12) in sequence and is rotationally connected to the eccentric bearing (11); the first cycloid wheel (9) and the second cycloid wheel (10) drive the eccentric bearing (11) to perform reverse circular motion, thereby driving the damping block (4) on the transmission shaft (5) to rotate in the opposite direction relative to the drum (3).

2. The double cycloid deceleration and descent control device according to claim 1, wherein The braking assembly includes a piston rod (18), a spring (19), a hydraulic oil pipe joint, a hydraulic oil pipe (20), a swivel head (21), a sealing ring (22) and a bearing (23); the output end of the piston rod (18) is inserted into the transmission shaft (5) through the spring (19) for supplying pressure into the transmission shaft (5) to push the push rod (7) to jack up the damping block (4) so that the damping block (4) is closely attached to the inner wall of the drum (3); the input end of the piston rod (18) is fixedly connected to the outer side of the rear panel (2) through the bearing (23); the other end of the bearing (23) is connected to the swivel head (21); a lock nut (24) is vertically arranged at the top of the swivel head (21); the hydraulic oil pipe (20) is connected to the lock nut (24); an olive sleeve (25), an oil needle (26) and a gasket (27) are arranged between the hydraulic oil pipe (20) and the swivel head (21).

3. The double cycloid deceleration and descent device according to claim 2, characterized in that, An oil-passing screw (28) is connected to one side of the swivel head (21).

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