CN217502463U

CN217502463U - Low-noise miniature curtain speed reducer

Info

Publication number: CN217502463U
Application number: CN202220081230.5U
Authority: CN
Inventors: 鲁斯超; 邹奋华
Original assignee: Ningbo Shunbang Surveying And Mapping Technology Co ltd
Current assignee: Ningbo Shunbang Surveying And Mapping Technology Co ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-09-27
Anticipated expiration: 2032-01-10

Abstract

The utility model discloses a miniature (window) curtain reduction gear of low noise, including one section sun tooth (8), output shaft (1), central locating pin (13), box (2) and gear drive mechanism, gear drive mechanism includes one section reduction gears, two-stage reduction gears and three-stage reduction gears, the equal coaxial setting of above-mentioned reduction gears is inside box (2), interconnect each other, one section sun tooth (8) rotate with one section reduction gears and are connected, output shaft (1) are connected with three-stage reduction gears and extend to box (2) outside, central locating pin (13) run through gear drive mechanism, the one end and one section sun tooth (8) of central locating pin (13) rotate and are connected, the other end and output shaft (1) of central locating pin (13) are fixed. The utility model provides a miniature (window) curtain reduction gear of low noise has compact structure, and it is effectual to slow down, and the coaxial location of speed reduction part, advantage such as small in noise during operation.

Description

Low-noise miniature curtain speed reducer

Technical Field

The utility model belongs to the technical field of intelligence house transmission and specifically relates to a miniature (window) curtain reduction gear of low noise is related to.

Background

The utility model provides a power metallurgy gear and plastic gear are adopted more to intelligence house trade transmission equipment, improvement along with people's standard of living, people gradually begin to pursue the quality life, equipment among the intelligence house trade often accompanies mechanical structure's motion when the operation, can produce the noise, influence quality of life that can be very big when serious, for example electric window curtain, the speed reducer structure who is equipped with among the electric window curtain is very compact, can't install the bearing, current curtain reduction gear relies on tooth clearance location itself mostly, gear among the speed reducer structure often can be because of lacking coaxial positioning when rotating, take place to rock, produce vibration and noise, influence the quality of life. There is therefore a need for a low noise miniature window covering retarder that can operate in a low noise manner.

Chinese patent application publication No. CN2684698Y, entitled "motorized window curtain" with publication date of 2005, 03, 16, discloses a motorized window curtain, which includes a pair of brackets; a roller blind having a chamber; the pair of fixed disks are plugged at two ends of the cylinder cavity and are respectively pivoted on the bracket; a curtain fixed on the cylinder of the rolling curtain cylinder; a gear ring sleeve fixed at one end of the cylinder cavity, and inner teeth are distributed on the inner wall of the gear ring sleeve; the rotary table and a motor fixing sleeve are arranged at the other end of the cylinder cavity, a motor speed reducing unit is arranged in the motor fixing sleeve, a rotary table is connected to an output shaft of the unit, and the rotary table is fixed with the roller shutter cylinder; the screw tooth gear is arranged on the rod bodies of the forward and backward rotation screw rods in a rotating manner and is also meshed with the internal teeth, and the travel switch is arranged in the travel switch seat cavity and is respectively connected with the motor and the power supply control switch by a circuit. The novel hydraulic drive device has the advantages of simple structure, reliable transmission, stable operation, free start and stop, no out-of-control displacement, concealed driving part, small volume, convenient installation and maintenance and low cost. However, the reduction unit in the reduction gear in the device is lack of coaxial positioning, the coaxiality of each gear in rotation is not good, and noise generated in operation can be increased.

Disclosure of Invention

The utility model discloses an overcome among the prior art speed reducer in the electric window curtain gear at different levels when operation and lack coaxial positioning, the noise is too big when the operation, influences daily life, provides a miniature (window) curtain reduction gear of low noise, has compact structure, and it is effectual to slow down, and the partial coaxial positioning of speed reduction, advantage such as small in noise when the operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a low-noise miniature curtain speed reducer comprises a section of sun gear 8, an output shaft 1, a center positioning pin 13, a box body 2 and a gear transmission mechanism, wherein the gear transmission mechanism comprises a section of speed reducing mechanism, a second section of speed reducing mechanism and a third section of speed reducing mechanism, the speed reducing mechanisms are coaxially arranged inside the box body 2, the second section of speed reducing mechanism is connected with the first section of speed reducing mechanism, the third section of speed reducing mechanism is connected with the second section of speed reducing mechanism, the first section of sun gear 8 is rotatably connected with the first section of speed reducing mechanism, the output shaft 1 is connected with the third section of speed reducing mechanism and extends to the outside of the box body 2, the center positioning pin 13 penetrates through the gear transmission mechanism, one end of the center positioning pin 13 is connected with the first section of sun gear 8, and the other end of the center positioning pin 13 is fixed with the output shaft 1.

In the technical scheme, in actual use, the first section of the sun gear 8 is connected with an external motor, the external motor drives the first section of the sun gear 8 to rotate, the first section of the sun gear 8 drives the first section of the speed reducing mechanism to rotate, the first section of the speed reducing mechanism drives the second section of the speed reducing mechanism to rotate, the second section of the speed reducing mechanism drives the third section of the speed reducing mechanism to rotate, the third section of the speed reducing mechanism drives the output shaft 1 to rotate to complete speed reduction, the three sections of the speed reducing mechanisms are positioned in a penetrating mode through the central positioning pin 13, the three sections of the speed reducing mechanisms are coaxially arranged, the whole device is good in coaxiality, stable in operation, small in noise during operation, compact in structure and small in occupied space, the speed reducing process is gradually completed through the three sections of the speed reducing mechanisms, the speed reducing effect is good, each level of the speed reducing mechanisms limits each other degree of freedom, and the rigidity of the whole device is guaranteed.

Preferably, the inner side of the box body 2 is provided with inner teeth 6, the first-stage speed reducing mechanism comprises a first-stage support 7 and a first-stage planet gears 10, a plurality of first-stage positioning pins 9 are fixed on the first-stage support 7, the first-stage planet gears 10 are correspondingly arranged on the first-stage positioning pins 9 and are meshed with the inner teeth 6 and the first-stage sun gears 8 simultaneously, the single-stage transmission ratio of the first-stage speed reducing mechanism is larger than 1, when the first-stage speed reducing mechanism operates, the first-stage sun gears 8 rotate to drive the first-stage planet gears 10 to rotate, and the first-stage planet gears 10 drive the first-stage support 7 because the first-stage planet gears 10 are meshed with the inner teeth 6 and the first-stage planet gears 10 rotate.

Preferably, the two-stage speed reducing mechanism comprises a two-stage support 12 and two-stage planet gears 5, a plurality of two-stage positioning pins 11 are fixed on the two-stage support 12, the two-stage planet gears 5 are correspondingly arranged on the two-stage positioning pins 11 and are meshed with the inner teeth 6 one by one, two-stage sun teeth 15 are fixed at the bottom of the one-stage support 7, the two-stage sun teeth 15 are meshed with the two-stage planet gears 5, the single-stage transmission ratio of the two-stage speed reducing mechanism is larger than 1, the two-stage sun teeth 15 rotate along with the rotation of the one-stage support 7, the two-stage sun teeth 15 serve as an input shaft of the two-stage speed reducing mechanism to drive the two-stage planet gears 5 to rotate, and the two-stage planet gears 5 are meshed with the inner teeth 6 to drive the two-stage support 12 to rotate so as to complete the second speed reduction.

Preferably, the three-section speed reducing mechanism comprises an arm support 3 and three sections of planet gears 4, a plurality of three-section positioning pins 14 are fixed on the arm support 3, the three sections of planet gears 4 are correspondingly arranged on the three sections of positioning pins 14 and are meshed with the internal teeth 6 one by one, three sections of sun teeth 16 are fixed at the bottom of the two sections of supports 12, the three sections of sun teeth 16 are meshed with the three sections of planet gears 4, the output shaft 1 is fixed with the arm support 3, the single-stage transmission ratio of the three sections of speed reducing mechanism is larger than 1, the two sections of supports 12 rotate, the three sections of sun teeth 16 rotate along with the rotation of the three sections of sun teeth 16, the three sections of planet gears 16 are used as input shafts of the three sections of speed reducing mechanism to drive the three sections of planet gears 4 to rotate, the three sections of planet gears 4 are meshed with the internal teeth 6 to drive the arm support 3 to rotate, the output shaft 1 is fixed with the arm support 3, and the arm support 3 rotates to drive the output shaft 1 to complete the whole speed reducing process.

Preferably, the output shaft 1, the center positioning pin 13 and the arm support 3 are of an integral structure, machining errors and assembly accumulated errors are reduced, the precision is higher, and the effects of reducing noise and improving rigidity are better.

Preferably, the first-stage planet gears 10, the second-stage planet gears 5, the third-stage planet gears 4, the first-stage sun gears 8, the second-stage sun gears 15 and the third-stage sun gears 16 are all straight gears, compared with helical gears, the straight gears are lower in cost and simpler to manufacture, a die structure for producing the straight gears is simpler and better to process, the coincidence degree of the straight gears is smaller, and when the straight gears are used, if the sun gears of all stages are not connected through a central shaft, all the gears are easy to be disorganized and run in an S shape in a swinging mode in the inner gear box body, and the noise is larger, so that the straight gears are used in cooperation with the central positioning pin 13, the advantages of the straight gears are reserved, the central positioning pin 13 is also used as the central shaft for positioning, and the noise caused by the straight gears is reduced.

Preferably, the output shaft 1 is provided with a chamfer, and the chamfer is designed to facilitate the installation of the output shaft 1 and the driven part.

The beneficial effects of the utility model are that: (1) the device has compact structure, small occupied space and convenient installation; (2) the reduction gears at all levels are coaxially positioned, the gear matching is good, the noise is low during operation, and compared with the prior art, the noise can be reduced by 3 to 5 decibels; (3) the gears limit the degree of freedom mutually, so that the tooth surfaces of the gears have correct contact positions, the gears are not easy to damage, and the rigidity is good; (4) the deceleration process is finished step by step, and the deceleration effect is good.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the invention except the box;

fig. 3 is a partial sectional view of the internal structure of the present invention.

In the figure: the device comprises an output shaft 1, a box body 2, an arm support 3, a three-section planet gear 4, a two-section planet gear 5, internal teeth 6, a one-section support 7, a one-section sun gear 8, a one-section positioning pin 9, a one-section planet gear 10, a two-section positioning pin 11, a two-section support 12, a center positioning pin 13, a three-section positioning pin 14, a two-section sun gear 15 and a three-section sun gear 16.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1:

as shown in fig. 1, 2 and 3, a low-noise miniature curtain speed reducer comprises an output shaft 1, a box body 2, an arm support 3, three-section planets 4, two-section planets 5, internal teeth 6, a first-section support 7, a first-section sun gear 8, a first-section positioning pin 9, a first-section planet gear 10, a second-section positioning pin 11, a second-section support 12, a center positioning pin 13, a third-section positioning pin 14, a second-section sun gear 15 and a third-section sun gear 16;

the gear transmission mechanism comprises a first-section speed reducing mechanism, a second-section speed reducing mechanism and a third-section speed reducing mechanism, the speed reducing mechanisms are coaxially arranged inside the box body 2, the second-section speed reducing mechanism is connected with the first-section speed reducing mechanism, the third-section speed reducing mechanism is connected with the second-section speed reducing mechanism, a first-section sun gear 8 is rotatably connected with the first-section speed reducing mechanism, the output shaft 1 is connected with the third-section speed reducing mechanism and extends to the outside of the box body 2, a central positioning pin 13 penetrates through the gear transmission mechanism, one end of the central positioning pin 13 is connected with the first-section sun gear 8, the other end of the central positioning pin 13 is fixedly provided with inner teeth 6 inside the box body 2 of the output shaft 1, the first-section speed reducing mechanism comprises a first-section support 7 and a first-section planet gears 10, a plurality of first-section positioning pins 9 are fixed on the first-section support 7, the first-section planet gears 10 are correspondingly arranged on the first-section positioning pins 9 and are simultaneously meshed with the inner teeth 6 and the first-section sun gear 8, the single-stage transmission ratio of the first-stage speed reducing mechanism is more than 1, the second-stage speed reducing mechanism comprises a second-stage support 12 and second-stage planet gears 5, a plurality of second-stage positioning pins 11 are fixed on the second-stage support 12, the second-stage planet gears 5 are correspondingly arranged on the second-stage positioning pins 11 in a one-to-one mode and are meshed with the inner teeth 6, a second-stage sun gear 15 is fixed at the bottom of the first-stage support 7 and is meshed with the second-stage planet gears 5, the single-stage transmission ratio of the second-stage speed reducing mechanism is more than 1, the three-stage speed reducing mechanism comprises an arm support 3 and three-stage planet gears 4, a plurality of three-stage positioning pins 14 are fixed on the arm support 3, the three-stage planet gears 4 are correspondingly arranged on the three-stage positioning pins 14 and are meshed with the inner teeth 6, a three-stage sun gear 16 is fixed at the bottom of the second-stage support 12, the three-stage sun gear 16 is meshed with the three-stage planet gears 4, the output shaft 1 is fixed with the arm support 3, the single-stage transmission ratio of the three-stage speed reducing mechanism is more than 1, the output shaft 1, the center positioning pin 13 and the arm support 3 are of an integral structure, the first-section planetary gear 10, the second-section planetary gear 5, the third-section planetary gear 4, the first-section sun gear 8, the second-section sun gear 15 and the third-section sun gear 16 are straight gears, and the output shaft 1 is provided with a chamfer angle.

In the technical scheme, when the device operates, the first section of the sun gear 8 is externally connected with the motor, the first section of the sun gear 8 rotates to drive the first section of the planet gears 10 to rotate, the first section of the planet gears 10 are meshed with the internal teeth 6, the first section of the planet gears 10 drive the first section of the support 7 to rotate, the single-stage transmission ratio of the first section of the speed reducing mechanism is greater than 1, the first-step speed reduction is completed in the process that the first section of the planet gears 8 drive the first section of the planet gears 10 and the first section of the planet gears 10 drive the first section of the support 7, the second section of the sun gear 15 rotates along with the first section of the support 7, the second section of the sun gear 15 serves as an input shaft of the second section of the speed reducing mechanism to drive the second section of the planet gears 5 to rotate, the second section of the planet gears 5 are meshed with the internal teeth 6 to drive the second section of the support 12 to rotate, the second section of the support 12 rotates, the third section of the sun gear 16 serves as an input shaft of the third section of the speed reducing mechanism to drive the third section of the planet gears 4 to rotate, three sections of planet gears 4 are meshed with inner teeth 6 to drive an arm support 3 to rotate, an output shaft 1 is fixed with the arm support 3, the arm support 3 rotates to drive the output shaft 1 to rotate, the whole speed reduction process is completed, the output shaft 1, a center positioning pin 13 and the arm support 3 are of an integral structure, machining errors and assembly accumulated errors are reduced, the precision is higher, the effects of reducing noise and improving rigidity are better, a first section of planet gears 10, a second section of planet gears 5, a third section of planet gears 4, a first section of sun gears 8, a second section of sun gears 15 and a third section of sun gears 16 are straight gears, compared with helical gears, the straight gears are lower in cost and simpler to manufacture, the structure of a die for producing the straight gears is simpler and better to process, but the coincidence degree of the straight gears is smaller, if the sun gears of each section are not connected by a central shaft when the sections are used, the gears of each section are easy to be disorganized and rotate in an S shape in a throwing mode in the inner gear box body, the noise is higher, so the straight gears are matched with the center positioning pin 13 to use, the advantages of the straight gear are kept, the center positioning pin 13 is also used as a center shaft for positioning, and noise caused by the straight gear is reduced. The chamfered design facilitates the mounting of the output shaft 1 with the driven member.

The utility model has the advantages that: the utility model has the advantages that: (1) the device has compact structure, small occupied space and convenient installation; (2) the reduction mechanisms at all levels are coaxially positioned, the gear matching is good, the noise is low during operation, and compared with the prior art, the noise can be reduced by 3 to 5 decibels; (3) the gears limit the degree of freedom mutually, so that the tooth surfaces of the gears have correct contact positions, the gears are not easy to damage, and the rigidity is good; (4) the deceleration process is finished step by step, and the deceleration effect is good.

Claims

1. The utility model provides a miniature (window) curtain reduction gear of low noise, characterized by, including one section sun tooth (8), output shaft (1), center locating pin (13), box (2) and gear drive mechanism, gear drive mechanism includes one section reduction gears, two-stage reduction gears and three-stage reduction gears, above-mentioned reduction gears all coaxial setting is inside box (2), two-stage reduction gears is connected with one section reduction gears, three-stage reduction gears is connected with two-stage reduction gears, one section sun tooth (8) rotate with one section reduction gears and are connected, output shaft (1) are connected with three-stage reduction gears and extend to the outside of box (2), center locating pin (13) run through gear drive mechanism, the one end of center locating pin (13) is connected with one section sun tooth (8), the other end of center locating pin (13) is fixed with output shaft (1).

2. A low-noise mini-type curtain decelerator as defined in claim 1, wherein the inner side of the casing (2) is provided with inner teeth (6), the first-stage deceleration mechanism comprises a first-stage support (7) and a first-stage planetary gear (10), a plurality of first-stage positioning pins (9) are fixed on the first-stage support (7), the first-stage planetary gears (10) are correspondingly arranged on the first-stage positioning pins (9) and are engaged with the inner teeth (6) and the first-stage sun gear (8), and the single-stage transmission ratio of the first-stage deceleration mechanism is greater than 1.

3. The miniature low-noise curtain speed reducer according to claim 2, wherein the two-stage speed reducer comprises a two-stage support (12) and two-stage planet gears (5), a plurality of two-stage positioning pins (11) are fixed on the two-stage support (12), the two-stage planet gears (5) are correspondingly arranged on the two-stage positioning pins (11) and are meshed with the internal teeth (6), two-stage sun teeth (15) are fixed at the bottom of the one-stage support (7), the two-stage sun teeth (15) are meshed with the two-stage planet gears (5), and the single-stage transmission ratio of the two-stage speed reducer is greater than 1.

4. The low-noise miniature curtain speed reducer according to claim 3, wherein the three-section speed reducer comprises an arm support (3) and three-section planet gears (4), a plurality of three-section positioning pins (14) are fixed on the arm support (3), the three-section planet gears (4) are correspondingly arranged on the three-section positioning pins (14) one by one and are meshed with the internal teeth (6), three-section sun teeth (16) are fixed at the bottom of the two-section support (12), the three-section sun teeth (16) are meshed with the three-section planet gears (4), the output shaft (1) is fixed with the arm support (3), and the single-stage transmission ratio of the three-section speed reducer is greater than 1.

5. A low noise mini curtain decelerator according to claim 4, where the output shaft (1), the center pin (13) and the arm support (3) are an integral structure.

6. A low-noise miniature curtain decelerator according to claim 4 or 5, wherein the teeth of the internal teeth (6), the first planetary gear (10), the second planetary gear (5), the third planetary gear (4), the first sun gear (8), the second sun gear (15) and the third sun gear (16) are straight teeth.

7. A low noise mini curtain decelerator as claimed in claims 1, 2, 3, 4 and 5 wherein the output shaft (1) is chamfered.