Tubular motors and motorized curtains with vibration and noise reduction functions

Abstract

This invention discloses a tubular motor and an electric curtain with vibration reduction and noise reduction functions. Belonging to the field of tubular motors, it exhibits good vibration reduction effect. The tubular motor with vibration reduction and noise reduction functions of this invention includes a motor body and a motor sleeve fitted outside the motor body. A vibration reduction device is provided between the motor body and the motor sleeve. The vibration reduction device includes an inner ring portion fitted on the motor body and an outer ring portion disposed on the outer periphery of the inner ring portion. Multiple elastic devices are provided between the inner ring portion and the outer ring portion. A first limiting structure is provided between the inner sidewall of the motor sleeve and the outer sidewall of the outer ring portion, and a second limiting structure is provided between the outer sidewall of the motor body and the inner sidewall of the inner ring portion. Multiple elastic locking tongues are provided between the inner ring portion and the outer ring portion. A through hole is provided on the outer ring portion for the elastic locking tongues to pop out. When the motor body is assembled into the motor sleeve, rotating the motor body drives the outer ring portion to rotate relative to the inner ring portion, causing the elastic locking tongues to extend from the through hole and engage with the motor sleeve.

Description

[Technical Field]

[0001] This invention relates to the field of tubular motors, and more particularly to tubular motors with vibration reduction and noise reduction functions and electric curtains. [Background Technology]

[0002] Electric motors are a common type of drive device, and more and more furniture now has automated functions, such as electric curtains, which can automatically open and close the curtains as needed. The curtain fabric of electric curtains is driven by a tubular motor, which includes a motor, a sleeve, and a transmission device inside the sleeve that transmits the motor's power to the outside to drive the curtain fabric to open and close. Noise is generated due to vibration during motor startup and transmission of the transmission components, which affects the user experience. Therefore, it is necessary to reduce the vibration and noise generated during the power transmission process within the tubular motor.

[0003] The usual practice is to place a vibration damping pad between the motor and the bushing. The vibration damping pad is usually made of silicone. One side of the vibration damping pad is attached to the motor, and the other side is attached to the bushing. Therefore, when the motor and the bushing are assembled, the position of the vibration damping pad is easily changed due to friction, resulting in poor vibration damping effect. [Summary of the Invention]

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and propose a tubular motor with vibration reduction and noise reduction function, which has a better vibration reduction effect.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A tubular motor with vibration reduction and noise reduction function includes a motor body and a motor sleeve fitted outside the motor body. A vibration damping device is provided between the motor body and the motor sleeve. The vibration damping device includes an inner ring portion fitted on the motor body and an outer ring portion disposed on the outer periphery of the inner ring portion and rotatable relative to the inner ring portion. Multiple elastic devices are provided between the inner ring portion and the outer ring portion to allow the outer ring portion to float in the radial direction of the inner ring portion. A first limiting structure for limiting the rotation of the outer ring portion is provided between the inner sidewall of the motor sleeve and the outer sidewall of the outer ring portion. A second limiting structure for limiting the rotation of the inner ring portion is provided between the outer sidewall of the motor body and the inner sidewall of the inner ring portion. Multiple elastic locking tongues are provided between the inner ring portion and the outer ring portion. The outer ring portion has a through hole for the elastic locking tongues to pop out. When the motor body is assembled into the motor sleeve, rotating the motor body drives the outer ring portion to rotate relative to the inner ring portion so that the elastic locking tongues extend from the through hole to engage with the motor sleeve.

[0007] Based on the above scheme, the inner ring portion includes a bottom wall and a first side wall extending radially from both sides of the bottom wall, the first side wall and the bottom wall forming a first cavity, the outer ring portion includes a top wall and a second side wall extending radially from both sides of the top wall, the second side wall and the top wall forming a second cavity communicating with the first cavity, and the elastic device and the elastic locking tongue are disposed between the first cavity and the second cavity.

[0008] Based on the above solution, the elastic latch includes a first positioning part having a first receiving groove and a latch body installed in the first receiving groove. The first receiving groove is provided with a first spring connected to the latch body, and the first spring is kept in a compressed state.

[0009] Based on the above scheme, the end of the latch body facing the top wall is a spherical structure, and the top wall is provided with a sliding groove, which is connected to the inner side wall of the top wall through an arc surface.

[0010] Based on the above scheme, the radial dimension of the spherical structure is L1, the radial dimension of the sliding groove is L2, L1 is greater than L2, and when the locking tongue body is inserted and engaged with the motor sleeve, the dimension of the locking tongue body extending out of the top wall is L3, L3 is greater than L1.

[0011] Based on the above scheme, the elastic device includes a second positioning part having a second receiving groove and a floating support member installed in the second receiving groove. The floating support member includes a ball head and a limiting post connected to the ball head. The limiting post extends into the second receiving groove. The second receiving groove is also provided with a second spring that maintains a compressed state. The second spring is wrapped around the outer periphery of the limiting post and abuts against the ball head. At least a portion of the ball head is located in the groove.

[0012] Based on the above scheme, in the circumferential direction of the outer ring portion, one side of the slide groove is provided with the through hole, and the other side of the slide groove is provided with a limiting boss. The top surface of the slide groove and the limiting boss are connected by an arc surface. The radius of the arc surface is the same as the radius of the ball head. The radius of the ball head is L4. The distance between the top surface of the limiting boss and the bottom wall of the slide groove is L5. L5 is greater than L4.

[0013] Based on the above scheme, the first limiting structure includes a plurality of first limiting protrusions disposed on the outer side wall of the outer ring portion and a plurality of first limiting grooves disposed on the inner side wall of the motor sleeve, wherein the first limiting grooves are slidably engaged with the first limiting protrusions. The second limiting structure includes a plurality of second limiting protrusions disposed on the inner side wall of the inner ring portion and a plurality of second limiting grooves disposed on the outer side wall of the motor body, wherein the second limiting grooves are slidably engaged with the second limiting protrusions.

[0014] Based on the above scheme, two vibration damping devices are provided between the motor body and the motor sleeve. The two vibration damping devices are installed on the motor body one after the other. The inner ring of the vibration damping device installed later is also provided with a third limiting protrusion. The motor body is provided with a third limiting groove that slides with the third limiting protrusion. The length of the third limiting groove is shorter than that of the second limiting groove.

[0015] An electric curtain includes a tubular motor and a curtain body driven by the tubular motor. The tubular motor is a tubular motor with vibration reduction and noise reduction function disclosed in any of the above technical solutions. The tubular motor is also provided with a coupling that is driven and cooperates with the motor body. The coupling extends out of the motor sleeve and is connected to the curtain body.

[0016] The beneficial effects of this invention are:

[0017] The tubular motor disclosed in this invention has vibration reduction and noise reduction functions. The inner ring is fitted onto the motor body and can move synchronously with the motor body, thus preventing vibration and noise caused by impact between the motor body and the inner ring. The outer ring and the inner ring can float relative to each other. When the motor body is running, the vibration generated by the motor body will drive the inner ring to generate the same frequency and amplitude. Under the action of the elastic device, the inner ring will not drive the outer ring to move, and the vibration generated by the inner ring can also be absorbed by the elastic device, which is converted into the expansion and contraction of the elastic device. This can avoid vibration and noise caused by impact between the inner ring and the outer ring, and there will be no vibration and noise caused by impact between the motor sleeve and the outer ring.

[0018] Within the motor sleeve, the movement of the installed motor body is restricted. A first limiting structure restricts the rotation of the outer ring relative to the motor sleeve, and a second limiting structure restricts the rotation of the inner ring relative to the motor body. Thus, although the inner and outer rings can float relative to each other in the radial direction, they will not rotate relative to each other during motor operation. After assembly, the elastic locking tongue engages with the motor sleeve to restrict the axial movement of the vibration damping device relative to the motor body and the motor sleeve. This limits the installation position of the vibration damping device, ensuring its vibration damping effect.

[0019] Before the vibration damping device is assembled into the tubular motor, the elastic locking tongue retracts inside the vibration damping device. During assembly, the vibration damping device can be first fitted onto the motor body, and then the motor body with the vibration damping device can be installed into the motor sleeve. During this process, since the elastic locking tongue does not protrude from the through hole, there will be no interference between the elastic locking tongue and the motor sleeve. Finally, the motor body is rotated so that the inner ring rotates relative to the outer ring. The elastic locking tongue can then move to the through hole position and pop out to engage with the motor sleeve. Under the action of the first limiting structure, there will be no positional change between the outer ring and the motor sleeve on the circumference, so as to ensure that the elastic locking tongue can be aligned with the hole on the motor sleeve that engages with the elastic locking tongue, thus reducing the assembly difficulty.

[0020] Furthermore, the inner ring portion includes a bottom wall and first sidewalls extending radially from both sides of the bottom wall, forming a first cavity. The outer ring portion includes a top wall and second sidewalls extending radially from both sides of the top wall, forming a second cavity communicating with the first cavity. The elastic device and the elastic locking tongue are disposed between the first cavity and the second cavity. The first cavity formed by the inner ring portion and the second cavity formed by the outer ring portion can accommodate the elastic device and the elastic locking tongue, and the first and second sidewalls have a limiting effect on the elastic device and the elastic locking tongue to prevent the inner ring portion and the outer ring portion from separating in the axial direction.

[0021] Furthermore, the elastic latch includes a first positioning part with a first receiving groove and a latch body installed in the first receiving groove. A first spring connected to the latch body is provided in the first receiving groove, and the first spring remains compressed. The first receiving groove of the first positioning part limits the position of the first spring and the latch body to prevent changes in their positions that would prevent alignment with the through hole. When the latch body is inside the vibration damping device or when it extends from the through hole, the first spring is compressed. Thus, when the inner ring rotates relative to the outer ring, the latch body, after aligning with the through hole, can immediately extend out of the through hole under the action of the first spring to engage with the motor sleeve. After the latch body engages with the motor sleeve, the first spring remains compressed and exerts elastic force on the latch body, ensuring that the latch body and the motor sleeve maintain their engagement.

[0022] Furthermore, the end of the latch body facing the top wall has a spherical structure, and the top wall is provided with a sliding groove, which is connected to the inner sidewall of the top wall through an arc surface. Under the action of the first spring, the latch body can remain abutting against the top wall. The spherical structure reduces the friction between the latch body and the top wall when the latch body rotates relative to the outer ring. The sliding groove has a certain circumferential limiting effect on the elastic latch, so that when the vibration damping device is assembled onto the motor body, the inner ring and outer ring are less likely to rotate relative to each other, causing the latch body to protrude from the through hole before the vibration damping device is assembled into the motor sleeve. The section where the slide connects to the inner sidewall of the top wall is designed with an arc-shaped curved surface, which guides the latch body. During assembly, when the motor body is rotated, the end of the latch body contacts the arc-shaped curved surface and is squeezed back into the first receiving groove. The guiding effect of the arc-shaped curved surface reduces the jerking sensation and reduces the torsional force required to drive the latch body back into the first receiving groove. This avoids the latch body from sliding through the through hole and failing to properly engage with the motor sleeve due to the instantaneous speed of the relative rotation of the inner and outer rings after the latch body retracts into the first receiving groove.

[0023] Furthermore, the radial dimension of the spherical structure is L1, and the radial dimension of the sliding groove is L2, where L1 is greater than L2. When the latch body is inserted into the motor sleeve, the dimension by which the latch body extends beyond the top wall is L3, where L3 is greater than L1. Setting L1 greater than L2 ensures that the plane of the portion where the sliding groove connects to the top wall can contact the spherical structure without contacting the plane on the latch body, thus guaranteeing the guiding effect of the arc-shaped surface on the latch body. Setting L3 greater than L1 prevents the latch body extending out of the through hole from retracting into the vibration damping device under external force, thus ensuring the stability of the vibration damping device within the tubular motor.

[0024] Furthermore, the elastic device includes a second positioning part with a second receiving groove and a floating support member installed within the second receiving groove. The floating support member includes a ball head and a limiting post connected to the ball head. The limiting post extends into the second receiving groove. A second spring, kept in a compressed state, is also provided within the second receiving groove. The second spring is wound around the outer periphery of the limiting post and abuts against the ball head. At least a portion of the ball head is located within the sliding groove. The ball head and the limiting post are integrally connected. The second spring is kept in a compressed state to keep the ball head abutting against the sliding groove. The second receiving groove has a limiting effect on the second spring, and the second spring has a limiting effect on the limiting post, allowing the floating support member to move relative to the outer ring with the inner ring. The sliding groove defines the movement path of the ball head on the top wall to prevent axial positional changes in the ball head. Under the action of the second spring, the floating support member can extend and retract within the second receiving groove, thereby converting the vibration of the motor body into the extension and retraction of the second spring to buffer the motor body. The second spring is located between the limiting post and the inner wall of the second receiving groove, so that during assembly, rotation of the inner ring will not cause the limiting post to collide with the inner wall of the second receiving groove. The friction between the ball head and the slide is small, so that the second spring will not bend radially on the limiting post due to friction during assembly.

[0025] Furthermore, in the circumferential direction of the outer ring portion, one side of the slide groove is provided with the through hole, and the other side of the slide groove is provided with a limiting boss. The top surface of the slide groove and the limiting boss are connected by an arc surface. The radius of the arc surface is the same as the radius of the ball head, and the radius of the ball head is L4. The distance between the top surface of the limiting boss and the bottom wall of the slide groove is L5, where L5 is greater than L4. The limiting boss can abut against the ball head to stop the ball head from displacing towards the limiting boss, thereby limiting the rotation direction of the inner ring portion relative to the outer ring portion during assembly, to facilitate the installation of the vibration damping device. Setting L5 to be greater than L4 allows the arc surface of the part where the slide groove and the limiting boss are connected to have a locking effect on the ball head, thereby stopping the ball head. If L5 is set to be less than or equal to L4, the arc surface has a guiding effect on the ball head, and the stopping effect is poor.

[0026] Furthermore, the first limiting structure includes multiple first limiting protrusions disposed on the outer side wall of the outer ring portion and multiple first limiting grooves disposed on the inner side wall of the motor sleeve. The first limiting grooves are slidably engaged with the first limiting protrusions. The second limiting structure includes multiple second limiting protrusions disposed on the inner side wall of the inner ring portion and multiple second limiting grooves disposed on the outer side wall of the motor body. The second limiting grooves are slidably engaged with the second limiting protrusions. The engagement of the second limiting protrusions and the second limiting grooves does not affect the axial displacement of the inner ring portion relative to the motor body, but it can restrict the circumferential rotation of the inner ring portion relative to the motor body. The engagement of the first limiting protrusions and the first limiting grooves does not affect the axial displacement of the outer ring portion relative to the motor sleeve, but it can restrict the circumferential rotation of the outer ring portion relative to the motor sleeve, thereby preventing the outer and inner ring portions from rotating after the vibration damping device is assembled with the motor body and the motor sleeve.

[0027] Furthermore, two vibration damping devices are provided between the motor body and the motor sleeve. These two devices are sequentially mounted on the motor body. The inner ring of the later-installed vibration damping device has a third limiting protrusion. The motor body has a third limiting groove that slides with the third limiting protrusion. The length of the third limiting groove is shorter than the second limiting groove. The earlier-installed vibration damping device does not engage with the third limiting groove, allowing it to slide past it. The later-installed vibration damping device, due to the engagement of the third limiting protrusion with the third limiting groove, cannot continue axially sliding after reaching the end of the third limiting groove. This effectively limits the position of the two vibration damping devices on the motor body, ensuring they are positioned optimally.

[0028] An electric curtain includes a tubular motor and a curtain body driven by the tubular motor. The tubular motor is a type of tubular motor with vibration reduction and noise reduction functions disclosed in any of the above-mentioned technical solutions. The tubular motor also includes a coupling that drives the motor body, extending out of the motor sleeve and connecting to the curtain body. By using the aforementioned tubular motor, the electric curtain generates less vibration and noise during the opening and closing of the curtain body, improving the user experience.

[0029] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. [Attached Image Description]

[0030] The invention will be further described below with reference to the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the tubular motor in an embodiment of the present invention;

[0032] Figure 2This is a schematic diagram of the internal structure of the tubular motor in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the internal structure of the motor bushing in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the vibration damping device in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the internal structure of the vibration damping device in an embodiment of the present invention;

[0036] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0037] Figure 7 This is a schematic diagram of the internal structure of the vibration damping device for the latch body extending through the through hole in an embodiment of the present invention;

[0038] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0039] Figure 9 This is a cross-sectional view of the tubular motor in an embodiment of the present invention;

[0040] Figure 10 This is a schematic diagram of the vibration damping device with a third limiting protrusion in an embodiment of the present invention.

[0041] Figure label:

[0042] Motor body 100;

[0043] Motor sleeve 200;

[0044] Inner ring 300, bottom wall 301, first side wall 302, first cavity 303, outer ring 310, top wall 311, second side wall 312, second cavity 313, sliding groove 314, limiting boss 315, through hole 320, sound insulation cotton 330;

[0045] Elastic device 400, second receiving groove 410, second positioning part 420, floating support 430, ball head 431, limiting post 432, second spring 440;

[0046] Elastic locking tongue 500, first receiving groove 510, first positioning part 520, locking tongue body 530, first spring 540;

[0047] First limiting protrusion 600, first limiting groove 610, second limiting protrusion 620, second limiting groove 630, third limiting protrusion 640, and third limiting groove 650.

Detailed Implementation Methods

[0048] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0049] The terms "exemplary" and "some embodiments" used below are meant to be "used as examples, embodiments, or illustrations," and any embodiment described as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. Numerous specific details are set forth in the following detailed description to better illustrate the invention, and those skilled in the art will understand that this disclosure can be practiced without certain specific details.

[0050] Reference Figures 1 to 10 The present invention discloses a tubular motor with vibration reduction and noise reduction function, including a motor body 100 and a motor sleeve 200 fitted outside the motor body 100, and a vibration reduction device is provided between the motor body 100 and the motor sleeve 200.

[0051] The vibration damping device includes an inner ring portion 300 fitted onto the motor body 100 and an outer ring portion 310 disposed on the outer periphery of the inner ring portion 300 and rotatable relative to the inner ring portion 300. A plurality of elastic devices 400 are provided between the inner ring portion 300 and the outer ring portion 310 to allow the outer ring portion 310 to float in the radial direction of the inner ring portion 300.

[0052] A first limiting structure for limiting the rotation of the outer ring 310 is provided between the inner wall of the motor sleeve 200 and the outer wall of the outer ring 310, and a second limiting structure for limiting the rotation of the inner ring 300 is provided between the outer wall of the motor body 100 and the inner wall of the inner ring 300.

[0053] Multiple elastic locking tongues 500 are provided between the inner ring portion 300 and the outer ring portion 310. The outer ring portion 310 is provided with a through hole 320 for the elastic locking tongues 500 to pop out. When the motor body 100 is assembled into the motor sleeve 200, rotating the motor body 100 drives the outer ring portion 310 to rotate relative to the inner ring portion 300 so that the elastic locking tongues 500 extend out of the through hole 320 to engage with the motor sleeve 200.

[0054] The tubular motor disclosed in this invention has vibration reduction and noise reduction functions. The inner ring 300 is fitted onto the motor body 100 and can move synchronously with the motor body 100, thus preventing vibration and noise caused by impact between the motor body 100 and the inner ring 300. The outer ring 310 and the inner ring 300 can float relative to each other. When the motor body 100 is running, the vibration generated by the motor body 100 will drive the inner ring 300 to generate the same frequency and amplitude. Under the action of the elastic device 400, the inner ring 300 will not drive the outer ring 310 to move, and the vibration generated by the inner ring 300 can also be absorbed by the elastic device 400 and converted into the extension and contraction of the elastic device 400. This can prevent vibration and noise caused by impact between the inner ring 300 and the outer ring 310, and there will also be no vibration and noise caused by impact between the motor sleeve 200 and the outer ring 310.

[0055] Within the motor sleeve 200, the movement of the installed motor body 100 is restricted. A first limiting structure restricts the rotation of the outer ring 310 relative to the motor sleeve 200, and a second limiting structure restricts the rotation of the inner ring 300 relative to the motor body 100. Thus, although the inner ring 300 and outer ring 310 can float relative to each other in the radial direction, they will not rotate relative to each other during motor operation. After assembly, the elastic locking tongue 500 engages with the motor sleeve 200 to restrict the axial movement of the vibration damping device relative to the motor body 100 and the motor sleeve 200. This limits the installation position of the vibration damping device, ensuring its vibration damping effect.

[0056] Before the vibration damping device is assembled into the tubular motor, the elastic locking tongue 500 retracts into the vibration damping device. During assembly, the vibration damping device can be first fitted onto the motor body 100, and then the motor body 100 with the vibration damping device can be installed into the motor sleeve 200. During this process, since the elastic locking tongue 500 does not protrude from the through hole 320, the elastic locking tongue 500 will not interfere with the motor sleeve 200. Finally, the motor body 100 is rotated so that the motor body 100 and the inner ring 300 rotate relative to the outer ring 310. The elastic locking tongue 500 can then move to the position of the through hole 320 and pop out to engage with the motor sleeve 200. Under the action of the first limiting structure, there will be no positional change between the outer ring 310 and the motor sleeve 200 on the circumference, so as to ensure that the elastic locking tongue 500 can be aligned with the hole on the motor sleeve 200 that engages with the elastic locking tongue 500, thus reducing the assembly difficulty.

[0057] The inner ring portion 300 includes a bottom wall 301 and first side walls 302 extending radially from both sides of the bottom wall 301. The first side walls 302 and the bottom wall 301 form a first cavity 303. The outer ring portion 310 includes a top wall 311 and second side walls 312 extending radially from both sides of the top wall 311. The second side walls 312 and the top wall 311 form a second cavity 313 communicating with the first cavity 303. The elastic device 400 and the elastic locking tongue 500 are accommodated in the first cavity 303 and the second cavity 313. One end of the elastic locking tongue 500 and the elastic device 400 is connected to the bottom wall 301, and the other end can move freely in the radial direction of the vibration damping device. The first side walls 302 and the second side walls 312 have a limiting effect on the elastic device 400 and the elastic locking tongue 500 to prevent the inner ring portion 300 and the outer ring portion 310 from separating in the axial direction.

[0058] Sound insulation cotton 330 is also provided at the ends of the first side wall 302 and the second side wall 312 to improve the noise reduction performance of the vibration damping device.

[0059] The elastic latch 500 includes a first positioning part 520 having a first receiving groove 510 and a latch body 530 installed in the first receiving groove 510. A first spring 540 connected to the latch body 530 is provided in the first receiving groove 510. The first spring 540 is kept in a compressed state. The first receiving groove 510 of the first positioning part 520 has a limiting effect on the first spring 540 and the latch body 530 to prevent the positions of the first spring 540 and the latch body 530 from changing and failing to align with the through hole 320.

[0060] When the latch body 530 is located inside the vibration damping device, and when the latch body 530 extends out of the through hole 320, the first spring 540 is in a compressed state. In this way, when the inner ring 300 rotates relative to the outer ring 310, the latch body 530 can immediately extend out of the through hole 320 and cooperate with the motor sleeve 200 after aligning with the through hole 320. After the latch body 530 cooperates with the motor sleeve 200, the first spring 540 is still in a compressed state and has elastic force acting on the latch body 530, so that the latch body 530 and the motor sleeve 200 can maintain a cooperative state.

[0061] The end of the latch body 530 facing the top wall 311 has a spherical structure, and the top wall 311 is provided with a groove 314. Under the action of the first spring 540, the latch body 530 can keep abutting against the top wall 311. The spherical structure reduces the friction between the latch body 530 and the top wall 311 when the inner ring 300 rotates relative to the outer ring 310. The groove 314 has a certain circumferential limiting effect on the elastic latch 500, so that when the vibration damping device is assembled onto the motor body 100, the inner ring 300 and the outer ring 310 are not prone to relative rotation, which would cause the latch body 530 to extend out of the through hole 320 before the vibration damping device is assembled into the motor sleeve 200.

[0062] The slide groove 314 is connected to the inner sidewall of the top wall 311 by a curved surface. The curved surface structure guides the latch body 530. During assembly, when the motor body 100 is rotated, the end of the latch body 530 contacts the curved surface and is squeezed back into the first receiving groove 510. Under the guidance of the curved surface, the jerking sensation is reduced, and the torsional force required to drive the latch body 530 back into the first receiving groove 510 is reduced. This avoids the latch body 530 from sliding through the through hole 320 and failing to cooperate smoothly with the motor sleeve 200 due to the instantaneous speed of the relative rotation of the inner ring 300 and the outer ring 310 after the latch body 530 retracts into the first receiving groove 510.

[0063] The aforementioned elastic device 400 includes a second positioning portion 420 having a second receiving groove 410 and a floating support member 430 installed within the second receiving groove 410. The floating support member 430 includes a ball head 431 and a limiting post 432 connected to the ball head 431. The limiting post 432 extends into the second receiving groove 410. A second spring 440, which is kept in a compressed state, is also provided within the second receiving groove 410. The second spring 440 is wound around the outer periphery of the limiting post 432 and abuts against the ball head 431. At least a portion of the ball head 431 is located within a sliding groove 314. The ball head 431 and the limiting post 432 are connected as a single unit. The second spring 440 is kept in a compressed state so that the ball head 431 abuts against the sliding groove 314. The second receiving groove 410 has a limiting effect on the second spring 440, and the second spring 440 has a limiting effect on the limiting post 432, so that the floating support member 430 can move relative to the outer ring portion 310 with the inner ring portion 300. The groove 314 defines the movement path of the ball head 431 on the top wall 311 to prevent axial positional changes in the ball head 431. Under the action of the second spring 440, the floating support 430 can extend and retract within the second receiving groove 410, thereby converting the vibration of the motor body 100 into the extension and retraction of the second spring 440 to buffer the motor body 100. The second spring 440 is located between the limiting post 432 and the inner wall of the second receiving groove 410 so that during assembly, the rotation of the inner ring 300 will not cause the limiting post 432 to collide with the inner wall of the second receiving groove 410. The friction between the ball head 431 and the groove 314 is small, thus preventing the second spring 440 from bending radially in the limiting post 432 due to friction during assembly.

[0064] The first limiting structure includes a plurality of first limiting protrusions 600 disposed on the outer side wall of the outer ring portion 310 and a plurality of first limiting grooves 610 disposed on the inner side wall of the motor sleeve 200. The first limiting grooves 610 and the first limiting protrusions 600 are in sliding engagement. The engagement between the first limiting protrusions 600 and the first limiting grooves 610 does not affect the axial displacement of the outer ring portion 310 relative to the motor sleeve 200, but it can limit the circumferential rotation of the outer ring portion 310 relative to the motor sleeve 200.

[0065] The second limiting structure includes multiple second limiting protrusions 620 disposed on the inner sidewall of the inner ring portion 300 and multiple second limiting grooves 630 disposed on the outer sidewall of the motor body 100. The second limiting grooves 630 are slidably engaged with the second limiting protrusions 620. The engagement between the second limiting protrusions 620 and the second limiting grooves 630 does not affect the axial displacement of the inner ring portion 300 relative to the motor body 100, but it can limit the circumferential rotation of the inner ring portion 300 relative to the motor body 100.

[0066] Under the combined action of the first limiting structure and the second limiting structure, the outer ring 310 and the inner ring 300 of the vibration damping device are prevented from rotating after the motor body 100 and the motor sleeve 200 are assembled.

[0067] To prevent the damping device from being driven to retract into the damping device by an axial force after the locking tongue body 530 extends out of the through hole 320 and engages with the motor sleeve 200, the radial dimension of the spherical structure is L1, and the radial dimension of the slide groove 314 is L2, where L1 is greater than L2. When the locking tongue body 530 is inserted into the motor sleeve 200, the dimension of the locking tongue body 530 extending out of the top wall 311 is L3, where L3 is greater than L1.

[0068] By setting L1 to be greater than L2, the plane of the part where the slide groove 314 connects with the top wall 311 can contact the spherical structure without contacting the plane on the latch body 530, so as to ensure the guiding effect of the arc surface on the latch body 530.

[0069] Setting L3 to be greater than L1 ensures that the latch body 530, which extends out of the through hole 320, is less likely to retract into the vibration damping device under external force, thus guaranteeing the stability of the vibration damping device within the tubular motor. Furthermore, the depth to which the latch body 530 is inserted into the motor sleeve 200 is also greater than L1, to prevent the latch body 530 from disengaging from the motor sleeve 200 after the vibration damping device is subjected to axial force.

[0070] During assembly, the inner ring portion 300 needs to rotate relative to the outer ring portion 310 in a specified direction to prevent the floating support member 430 from extending out of the vibration damping device through the through hole 320. Therefore, a limiting boss 315 is provided on the outer ring portion 310 to stop the floating support member 430 and restrict its movement toward the limiting boss 315. In the circumferential direction of the outer ring portion 310, a through hole 320 is provided on one side of the slide groove 314, and a limiting boss 315 is provided on the other side of the slide groove 314. The limiting boss 315 can abut against the ball head 431 to stop the ball head 431 from displacing toward the limiting boss 315, thereby limiting the rotation direction of the inner ring portion 300 relative to the outer ring portion 310 during assembly, facilitating the installation of the vibration damping device.

[0071] The top surfaces of the slide groove 314 and the limiting boss 315 are connected by an arc surface. The radius of the arc surface is the same as the radius of the ball head 431, which is L4. The distance between the top surface of the limiting boss 315 and the bottom wall 301 of the slide groove 314 is L5. L5 is greater than L4. Setting L5 to be greater than L4 makes the arc surface of the part where the slide groove 314 and the limiting boss 315 are connected have a locking effect on the ball head 431, thereby stopping the ball head 431. If L5 is set to be less than or equal to L4, the arc surface has a guiding effect on the ball head 431, and the stopping effect is poor.

[0072] like Figure 10 As shown, to improve vibration damping and enhance the stability of the motor body 100 within the motor sleeve 200, two vibration damping devices are provided between the motor body 100 and the motor sleeve 200. These two devices are sequentially mounted on the motor body 100. The inner ring 300 of the later-installed vibration damping device is further provided with a third limiting protrusion 640. The motor body 100 has a third limiting groove 650 that slides in cooperation with the third limiting protrusion 640. The length of the third limiting groove 650 is shorter than that of the second limiting groove 630. The earlier-installed vibration damping device does not engage with the third limiting groove 650, allowing it to slide past it. The later-installed vibration damping device, due to the engagement of the third limiting protrusion 640 with the third limiting groove 650, cannot continue axially sliding after reaching the end of the third limiting groove 650. This effectively limits the position of the two vibration damping devices on the motor body 100, ensuring that the vibration damping devices are positioned optimally on the motor body 100.

[0073] The present invention also discloses an electric curtain, including a tubular motor and a curtain body driven by the tubular motor. The tubular motor is a tubular motor with vibration reduction and noise reduction function disclosed in any of the above technical solutions. The tubular motor is also provided with a coupling that is driven and cooperates with the motor body. The coupling extends out of the motor sleeve and is connected to the curtain body.

[0074] During operation, the power generated by the motor is first transmitted to the coupling, and then transmitted to the curtain body through the coupling. The coupling is equipped with vibration damping pads, which can reduce the vibration and noise generated by the motor body during power transmission with the coupling. The motor body and the motor sleeve are also equipped with vibration damping devices, so there is no obvious vibration or noise during the opening and closing of the curtain body, which improves the user experience.

[0075] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A tubular motor with vibration reduction and noise reduction function, comprising a motor body and a motor sleeve fitted over the motor body, characterized in that, A vibration damping device is provided between the motor body and the motor sleeve. The vibration damping device includes an inner ring portion fitted onto the motor body and an outer ring portion disposed on the outer periphery of the inner ring portion and rotatable relative to the inner ring portion. Multiple elastic devices are provided between the inner ring portion and the outer ring portion to allow the outer ring portion to float radially within the inner ring portion. A first limiting structure for limiting the rotation of the outer ring portion is provided between the inner sidewall of the motor sleeve and the outer sidewall of the outer ring portion. A second limiting structure for limiting the rotation of the inner ring portion is provided between the outer sidewall of the motor body and the inner sidewall of the inner ring portion. Multiple elastic locking tongues are provided between the inner ring portion and the outer ring portion. The outer ring portion has a through hole for the elastic locking tongues to pop out. When the motor body is assembled into the motor sleeve, rotating the motor body drives the outer ring portion to rotate relative to the inner ring portion, causing the elastic locking tongues to extend from the through hole and engage with the motor sleeve. The inner ring portion includes a bottom wall and first side walls extending radially from both sides of the bottom wall, forming a first cavity. The outer ring portion includes a top wall and second side walls extending radially from both sides of the top wall, forming a second cavity communicating with the first cavity. The elastic device and the elastic latch are disposed between the first cavity and the second cavity. The elastic latch includes a first positioning portion having a first receiving groove and a latch body installed in the first receiving groove. A first spring connected to the latch body is provided in the first receiving groove. The first spring is kept in a compressed state. Before the vibration damping device is assembled into the tubular motor, the elastic latch retracts into the vibration damping device.

2. The tubular motor with vibration reduction and noise reduction function according to claim 1, characterized in that, The end of the latch body facing the top wall has a spherical structure, and the top wall is provided with a sliding groove, which is connected to the inner side wall of the top wall through an arc surface.

3. The tubular motor with vibration reduction and noise reduction function according to claim 2, characterized in that, The spherical structure has a radial dimension of L1, the sliding groove has a radial dimension of L2, and L1 is greater than L2. When the locking tongue body is inserted and engaged with the motor sleeve, the locking tongue body extends out of the top wall by a dimension of L3, and L3 is greater than L1.

4. The tubular motor with vibration reduction and noise reduction function according to claim 2, characterized in that, The elastic device includes a second positioning part having a second receiving groove and a floating support member installed in the second receiving groove. The floating support member includes a ball head and a limiting post connected to the ball head. The limiting post extends into the second receiving groove. The second receiving groove is also provided with a second spring that maintains a compressed state. The second spring is wrapped around the outer periphery of the limiting post and abuts against the ball head. At least a portion of the ball head is located in the groove.

5. The tubular motor with vibration reduction and noise reduction function according to claim 4, characterized in that, In the circumferential direction of the outer ring portion, a through hole is provided on one side of the slide groove, and a limiting boss is provided on the other side of the slide groove. The top surface of the slide groove and the limiting boss are connected by an arc surface. The radius of the arc surface is the same as the radius of the ball head. The radius of the ball head is L4. The distance between the top surface of the limiting boss and the bottom wall of the slide groove is L5. L5 is greater than L4.

6. The tubular motor with vibration reduction and noise reduction function according to claim 1, characterized in that, The first limiting structure includes a plurality of first limiting protrusions disposed on the outer side wall of the outer ring portion and a plurality of first limiting grooves disposed on the inner side wall of the motor sleeve, wherein the first limiting grooves are slidably engaged with the first limiting protrusions. The second limiting structure includes a plurality of second limiting protrusions disposed on the inner side wall of the inner ring portion and a plurality of second limiting grooves disposed on the outer side wall of the motor body, wherein the second limiting grooves are slidably engaged with the second limiting protrusions.

7. The tubular motor with vibration reduction and noise reduction function according to claim 6, characterized in that, Two vibration damping devices are provided between the motor body and the motor sleeve. The two vibration damping devices are installed on the motor body one after the other. The inner ring of the vibration damping device installed later is also provided with a third limiting protrusion. The motor body is provided with a third limiting groove that slides with the third limiting protrusion. The length of the third limiting groove is shorter than that of the second limiting groove.

8. An electric curtain, characterized in that, The device includes a tubular motor and a curtain body driven by the tubular motor. The tubular motor is a tubular motor with vibration reduction and noise reduction function as described in any one of claims 1 to 7. The tubular motor is also provided with a coupling that is driven and cooperates with the motor body. The coupling extends out of the motor sleeve and is connected to the curtain body.

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