Speed ​​reduction mechanism for rolling shutter doors

Abstract

The present invention provides a speed reduction mechanism for rolling shutter doors. Two eccentric bearings are sleeved on the rotating shaft of the motor. The inner ring of the eccentric bearing is sleeved outside the rotating shaft of the motor. The outer ring is respectively connected to the inner wall of the opening at the center of the circle of two stacked cycloid disks through key transmission, and the initial positions of the two eccentric bearings are different. The rotating shaft of the motor drives the two eccentric bearings to rotate eccentrically, and each eccentric bearing drives a cycloid disk to swing eccentrically. The disk surface of the cycloid disk is provided with a plurality of through holes at intervals along the circumferential direction. A planetary sleeve is provided with a cycloid needle corresponding to the through hole along the circumferential direction on one side facing the cycloid disk, and the diameter of the cycloid needle is smaller than the diameter of the through hole. When the cycloid disk swings, the cycloid needle rotates around its own axis. An output shaft is provided on the side of the planetary sleeve away from the cycloid disk. When the cycloid needle rotates, the planetary sleeve and the output shaft rotate accordingly. The above-mentioned speed reduction mechanism for rolling shutter doors has a small size and a large load-bearing capacity.

Description

Technical Field

[0001] The invention relates to a deceleration mechanism, in particular to a deceleration mechanism for a rolling door. Background Art

[0002] Electric rolling shutter doors are widely used in building decoration, shopping malls, residential areas and other places. The reducer, as one of the controllers for controlling the lifting of rolling shutter doors, is an indispensable and important component for the long-term stable and smooth operation of rolling shutter doors.

[0003] In the prior art, the reducer commonly used in the electric rolling door industry has the following working process: the motor front cover is pressed onto the reducer body, and the motor shaft inputs power from the motor front cover to the gear shaft installed in the reducer body cavity, and then the gear shaft drives the output shaft to rotate through the gear, thereby completing the deceleration process and outputting the power. In order to ensure the smooth completion of the above process, most of the existing rolling door reducers adopt a structure in which only the gear shaft used as an intermediate transition transmission is completely set in the reducer body cavity; and the output shaft is installed on the reducer body, and only the part connected to the gear shaft extends into the reducer body cavity, and the gear shaft is positioned by the bearing support at the connection part of the reducer body cavity. In order to support and position the other end of the output shaft, the reducer body needs to be made thicker. Through the structural analysis of the existing electric rolling shutter doors, it can be found that: at present, the manufacture of a reducer for an electric rolling shutter door requires a large amount of aluminum ingot raw materials, which brings great production cost pressure to the enterprise; in addition, during the operation of the reducer, in order to ensure a longer service life of the gears, the gears are currently lubricated by applying dry grease on the gear tooth surface. During long-term use, the gears will wear out due to the drying of the grease, thereby greatly reducing the service life of the gears. Summary of the invention

[0004] The main technical problem to be solved by the present invention is to provide a speed reduction mechanism for a rolling door, which has a small volume and a large bearing capacity.

[0005] In order to solve the above technical problems, the present invention provides a speed reduction mechanism for a rolling door, characterized in that: two eccentric bearings are sleeved on the rotating shaft of the motor, the inner ring of the eccentric bearing is sleeved outside the rotating shaft of the motor, the outer ring is respectively connected to the inner wall of the opening at the center of two stacked cycloid disks through key transmission, and the initial positions of the two eccentric bearings are different; the rotating shaft of the motor drives the two eccentric bearings to rotate eccentrically, and each eccentric bearing drives a cycloid disk to eccentrically swing;

[0006] A plurality of through holes are arranged at intervals along the circumferential direction on the disk surface of the cycloid disk; a cycloid needle corresponding to the through holes is arranged along the circumferential direction on the side of a planetary sleeve facing the cycloid disk, and the diameter of the cycloid needle is smaller than the diameter of the through hole; when the cycloid disk oscillates, the cycloid needle rotates around its own axis;

[0007] An output shaft is provided on the side of the planet sleeve away from the cycloid disk; when the cycloid needle rotates, the planet sleeve and the output shaft rotate accordingly;

[0008] It also includes a set of outer shells arranged outside the cycloid disk, the outer circumference of the cycloid disk is continuously distributed with arc grooves along the circumferential direction, and sharp teeth are formed between the arc grooves; the inner circumference of the outer shell is provided with limit posts at intervals along the circumferential direction, and the limit posts cooperate with the arc grooves to limit the swing amplitude of the cycloid disk.

[0009] In a preferred embodiment: it also includes a rear end cover, which is sleeved outside the rotating shaft of the motor and located on the side of the cycloid disk away from the planetary sleeve; a first bearing is arranged outside the rear end cover and the side wall of the rotating shaft of the motor.

[0010] In a preferred embodiment: it also includes a front end cover, which is sleeved outside the output shaft; a second bearing is arranged outside the front end cover and the side wall of the output shaft.

[0011] In a preferred embodiment: the shell is located between the front cover and the rear cover, and the three are provided with stoppers and mounting holes at corresponding positions, and the three are fixed together by bolts passing through the mounting holes.

[0012] In a preferred embodiment: the end of the rotating shaft of the motor is inserted into the planetary sleeve, and a third bearing is arranged between the end of the rotating shaft of the motor and the planetary sleeve.

[0013] In a preferred embodiment: it also includes a reinforcing ring, the cycloidal needle is inserted into the reinforcing ring after passing through two cycloidal disks; the rear end cover is provided with a platform extending along the horizontal direction, and the inner side wall of the reinforcing ring is supported against the platform; a fourth bearing is provided between the outer side wall of the reinforcing ring and the rear end cover.

[0014] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0015] The present invention provides a speed reduction mechanism for a rolling door, which uses a cycloid pin speed reduction mechanism to replace a traditional gear speed reduction mechanism. The structure of the cycloid pin speed reduction mechanism is optimized, which greatly reduces the volume and weight of the cycloid pin speed reduction mechanism, so that it can be adapted for use on the rolling door. Compared with the gear speed reduction mechanism, the cycloid pin speed reduction mechanism has the advantages of large bearing capacity and can still be used stably after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural cross-sectional view of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to further explain the technical solution of the patent of the present invention, a detailed description is given below through specific examples.

[0018] refer to Figure 1 The present invention provides a speed reduction mechanism for a rolling door, wherein two eccentric bearings 2 are sleeved on a rotating shaft 1 of a motor, the inner rings of the eccentric bearings 2 are sleeved outside the rotating shaft of the motor, and the outer rings are respectively connected to the inner walls of openings at the centers of two stacked cycloid disks 3 by key transmission, and the initial positions of the two eccentric bearings 2 are different; the rotating shaft 1 of the motor drives the two eccentric bearings 2 to rotate eccentrically, and each eccentric bearing 2 drives a cycloid disk 3 to eccentrically swing;

[0019] The cycloid disk 3 is provided with a plurality of through holes at intervals along the circumferential direction on the disk surface; a planetary sleeve 4 is provided with cycloid needles 6 corresponding to the through holes along the circumferential direction on one side of the cycloid disk 3, and the diameter of the cycloid needles 6 is smaller than the diameter of the through holes; when the cycloid disk 3 oscillates, the cycloid needles 6 rotate around their own axes;

[0020] An output shaft 5 is provided on the side of the planet sleeve 4 away from the cycloid disk 3; when the cycloid needle 6 rotates, the planet sleeve 4 and the output shaft 5 rotate accordingly;

[0021] It also includes a set of outer shells 7 arranged outside the cycloid disk 3, and the outer circumference of the cycloid disk 3 is continuously distributed with arc grooves along the circumferential direction, and sharp teeth are formed between the arc grooves; the inner circumference of the outer shell 7 is provided with limit posts 16 at intervals along the circumferential direction, and the limit posts 16 cooperate with the arc grooves to limit the swing amplitude of the cycloid disk 3.

[0022] In addition, it also includes a rear end cover 8, which is sleeved outside the motor shaft 1 and located on the side of the cycloid disk 3 away from the planetary sleeve 4; a first bearing 9 is arranged outside the side wall of the rear end cover 8 and the motor shaft 1.

[0023] Furthermore, it also includes a front end cover 10, which is sleeved on the output shaft 5; a second bearing 11 is arranged outside the front end cover 10 and the side wall of the output shaft 5. The housing 7 is located between the front end cover 10 and the rear end cover 8, and the three are provided with stoppers and mounting holes at corresponding positions, and the three are fixed together by bolts 12 passing through the mounting holes.

[0024] The end of the rotating shaft 1 of the motor is inserted into the planetary sleeve 4 , and a third bearing 13 is arranged between the end of the rotating shaft 1 of the motor and the planetary sleeve 4 .

[0025] In this embodiment, a reinforcing ring 14 is also included, and the cycloidal needle 6 is inserted into the reinforcing ring 14 after passing through the two cycloidal disks 3; the rear end cover 8 is provided with a platform extending along the horizontal direction, and the inner side wall of the reinforcing ring is supported against the platform; a fourth bearing 15 is provided between the outer side wall of the reinforcing ring and the rear end cover 8.

[0026] When the motor shaft 1 rotates one circle with the eccentric bearing 2, due to the characteristics of the tooth profile curve on the cycloid disc 3 and the limitation of the upper limit column on the housing 7, the movement of the cycloid disc 3 becomes a planar motion with both revolution and rotation. When the motor shaft 1 rotates one circle, the eccentric bearing 2 also rotates one circle, and the cycloid disc 3 rotates one tooth in the opposite direction to reduce speed. The low-speed rotation of the cycloid disc 3 is transmitted to the planetary sleeve 4 through the cycloid needle 6, thereby obtaining a lower output speed. This structure combines the output shaft 5 and the cycloid needle 6 together through the planetary sleeve 4, which greatly saves space and increases strength.

[0027] In addition, a chamber is formed between the front cover 10 and the second bearing 11, and between the rear cover 8 and the first bearing 9 through a sealing cover, and the housing 7 has an oil hole connected to the chamber, and the chamber is filled with lubricating oil through the oil hole to lubricate the entire speed reduction mechanism. The oil hole is sealed by an oil hole bolt 17.

[0028] The above is only a preferred specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the present invention within the technical scope disclosed by the present invention shall be deemed to infringe the protection scope of the present invention.

Claims

1. A deceleration mechanism for a rolling door, characterized in that: Two eccentric bearings are sleeved on the rotating shaft of the motor, the inner ring of the eccentric bearing is sleeved outside the rotating shaft of the motor, and the outer ring is respectively connected to the inner wall of the opening at the center of the two stacked cycloid disks through key transmission, and the initial positions of the two eccentric bearings are different; the rotating shaft of the motor drives the two eccentric bearings to rotate eccentrically, and each eccentric bearing drives a cycloid disk to eccentrically swing; A plurality of through holes are arranged at intervals along the circumferential direction on the disk surface of the cycloid disk; a cycloid needle corresponding to the through holes is arranged along the circumferential direction on the side of a planetary sleeve facing the cycloid disk, and the diameter of the cycloid needle is smaller than the diameter of the through hole; when the cycloid disk oscillates, the cycloid needle rotates around its own axis; An output shaft is provided on the side of the planet sleeve away from the cycloid disk; when the cycloid needle rotates, the planet sleeve and the output shaft rotate accordingly; It also includes a set of outer shells arranged outside the cycloid disk, wherein the outer circumference of the cycloid disk is continuously distributed with arc grooves along the circumferential direction, and sharp teeth are formed between the arc grooves; the inner circumference of the outer shell is provided with limit posts at intervals along the circumferential direction, and the limit posts cooperate with the arc grooves to limit the swing amplitude of the cycloid disk; It also includes a rear end cover, which is sleeved outside the rotating shaft of the motor and located on the side of the cycloid disk away from the planetary sleeve; a first bearing is arranged outside the rear end cover and the side wall of the rotating shaft of the motor; It also includes a front end cover, which is sleeved outside the output shaft; a second bearing is arranged outside the front end cover and the side wall of the output shaft; It also includes a reinforcing collar, the cycloid needle is inserted into the reinforcing collar after passing through two cycloid discs; the rear end cover is provided with a platform extending in the horizontal direction, the inner side wall of the reinforcing collar is supported against the platform; a fourth bearing is provided between the outer side wall of the reinforcing collar and the rear end cover; A chamber is formed between the front end cover and the second bearing and between the rear end cover and the first bearing through a sealing cover. The housing has an oil hole connected to the chamber. Lubricating oil is filled into the chamber through the oil hole to lubricate the entire reduction mechanism.

2. A speed reduction mechanism for a rolling door according to claim 1, characterized in that: The shell is located between the front cover and the rear cover, and the three are provided with stoppers and mounting holes at corresponding positions, and the three are fixed together by bolts passing through the mounting holes.

3. The deceleration mechanism for a rolling door according to claim 1, characterized in that: The end of the rotating shaft of the motor is inserted into the planetary sleeve, and a third bearing is arranged between the end of the rotating shaft of the motor and the planetary sleeve.

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