Tubular motor

Abstract

The utility model discloses a tubular motor, comprising a motor body which comprises a motor shaft; the speed reduction device is directly or indirectly connected with the motor shaft; the speed reduction device drives a load through the output part; the manual device comprises an input shaft which can be connected with or separated from the motor shaft in a linear movement mode, when the input shaft is connected with the motor shaft, the input shaft can drive the motor shaft to rotate, and the input shaft and the motor shaft are coaxially arranged; and a brake device. And the brake device is arranged in the speed reduction device, and is arranged between the motor body and the speed reduction device or between the speed reduction device and the output part. Compared with the prior art, the manual operation device has the advantages that the linear movement of the input shaft of the manual operation device only needs to meet the requirement that the motor shaft can be driven to rotate, the manual operation device does not need to be matched with the brake device, and therefore the requirement for the machining size of the brake device in the axial direction can be lowered, and cost is lowered.

Description

Technical Field

[0001] This utility model relates to a power device, and more particularly to a tubular motor. Background Technology

[0002] Electric roller shutters or electric screens typically use small tubular motors as their power source. A tubular motor is a high-performance motor that includes a tubular housing and components such as a drive assembly, brake assembly, and stroke control assembly supported by bearing seats within the housing. When in use, the motor is covered by an outer tube, which is then installed in the appropriate location.

[0003] Existing manual / automatic tubular motors, such as the novel tubular motor disclosed in Chinese Patent Application No. 202122579586.X, include a motor, a gearbox, and a braking device. The braking device includes an electromagnet, a first friction plate, a second friction plate, a first housing, and a brake pad. When the power is off, the brake also engages, pulling the chain causes the input shaft to rotate, driving the first pin to move on the inclined plane, pushing the first sleeve block towards the push rod. Then, the second pin engages with the stop block, allowing the rotation of the input shaft to be transmitted to the rotating shaft. Simultaneously, the first sleeve block also pushes the push rod to retract into the pin hole, causing the first friction plate to retract against the thrust of the first spring. At this point, the brake is unlocked, and pulling the chain can drive the motor housing to rotate.

[0004] In this existing tubular motor, the braking device is located between the motor and the manual input section. During manual operation, the first sleeve block of the manual input section engages with a push rod on the motor shaft to achieve axial movement, unlocking the braking device. Simultaneously, the second pin on the first sleeve block of the manual input section engages with a stop block of the braking device to transmit rotational motion to the motor shaft. Because the first sleeve block (second pin) must transmit both linear and rotational motion, the distance between the second pin and the stop block, as well as the distance between the first sleeve block and the push rod, requires strict control. Therefore, the manufacturing process of the manual input section demands very high precision, resulting in high manufacturing costs.

[0005] Therefore, further improvements are needed. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a tubular motor that reduces the difficulty of processing, addressing the shortcomings of the existing technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a tubular motor, comprising:

[0008] The motor body, which includes the motor shaft;

[0009] The speed reduction device is directly or indirectly connected to the motor shaft;

[0010] The output section, through which the speed reduction device drives the load;

[0011] A manual device includes an input shaft capable of linearly engaging or disengaging from a motor shaft; when engaged, the input shaft drives the motor shaft to rotate; the input shaft and the motor shaft are coaxially arranged.

[0012] Braking device; characterized in that:

[0013] The braking device is located inside the reduction gear, between the motor body and the reduction gear, or between the reduction gear and the output unit.

[0014] By placing the brake device between the motor body and the reduction gear, between the reduction gear and the output section, or inside the reduction gear, the linear movement of the input shaft of the manual device only needs to be sufficient to drive the motor shaft to rotate, without the need for a brake device. This reduces the requirements for the machining dimensions of the axial brake device, thereby reducing costs.

[0015] Preferably, the deceleration device includes at least two deceleration stages, and the braking device is disposed between two adjacent deceleration stages.

[0016] Preferably, to facilitate stable braking, the braking device includes:

[0017] The input component, including a first flange, is capable of receiving the torque output from the motor shaft.

[0018] The output component, including a second flange, is capable of transmitting torque to the output end of the reduction gear.

[0019] A helical spring, wherein a first flange and a second flange extend into the helical spring; when the first flange engages with the helical spring, the helical spring contracts radially inward; and when the second flange engages with the helical spring, the helical spring expands radially outward.

[0020] The friction component is located on the outer periphery of the coil spring and abuts radially against the coil spring to provide a braking frictional force to the coil spring.

[0021] Preferably, at least one end of the helical spring forms a lug extending radially inward into the helical spring, and the first flange of the input component and the second flange of the output component are respectively located on opposite sides of the same lug and selectively abut against the lug.

[0022] Preferably, to facilitate the input and output of torque by the input and output components, the input component further includes a first disc body directly or indirectly connected to the motor shaft, and the output component further includes a second disc body that transmits torque to the output end of the reduction gear. The first flange extends from the first disc body toward the second disc body, and the second flange extends from the second disc body toward the first disc body.

[0023] To facilitate the fixing of the friction components, the tubular motor also includes an outer tube, and the speed reduction device, braking device and motor body are disposed inside the outer tube, with the friction components fixed relative to the outer tube.

[0024] To facilitate the input shaft driving the motor shaft to rotate, according to one aspect of this utility model, a stop block is provided on the end of the motor shaft adjacent to the input shaft, and a stop rod is provided on the stop block. The extension direction of the stop rod is parallel to the motor shaft. A pin is provided on the end of the input shaft adjacent to the motor shaft. The extension direction of the pin is perpendicular to the input shaft. The pin can move linearly to abut or separate from the stop rod. When the pin abuts with the stop rod, the input shaft can drive the motor shaft to rotate.

[0025] Furthermore, the tubular motor also includes an outer tube, and the reduction device, braking device and motor body are disposed inside the outer tube. The manual device also includes an end cap disposed on the outer side of the end of the outer tube and a manual transmission component extending from the outside of the outer tube into the end cap. The input shaft is partially located inside the outer tube and partially located inside the end cap. The manual transmission component can drive the input shaft to move linearly. The manual transmission component is provided with a first bevel tooth, and the input shaft is provided with a second bevel tooth that can mesh with the first bevel tooth, so that the manual transmission component can also drive the input shaft to rotate. Thus, the input shaft can be moved conveniently from outside the outer tube.

[0026] To facilitate the input shaft driving the motor shaft to rotate, according to another aspect of this utility model, a stop is provided on the end of the motor shaft adjacent to the input shaft, the stop is provided with a first boss, and a second boss is provided on the end of the input shaft adjacent to the motor shaft. The second boss can move linearly to abut or separate from the first boss in the circumferential direction. When the first boss and the second boss abut, the input shaft can drive the motor shaft to rotate.

[0027] Compared with the prior art, the advantages of this utility model are: by setting the brake device between the motor body and the reduction device, between the reduction device and the output part, or inside the reduction device, the linear movement of the input shaft of the manual device only needs to be able to drive the motor shaft to rotate, without having to cooperate with the brake device. This reduces the requirements for the machining dimensions of the axial brake device, thereby reducing costs. Attached Figure Description

[0028] Figure 1This is a schematic diagram of a tubular motor according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the concealed outer tube of the tubular motor according to an embodiment of the present invention;

[0030] Figure 3 This is a cross-sectional view of the tubular motor according to an embodiment of the present utility model;

[0031] Figure 4 This is a schematic diagram of the speed reduction device, manual retraction part, and braking device of the tubular motor hidden part according to an embodiment of the present utility model.

[0032] Figure 5 This is a schematic diagram showing the cooperation between the motor body of the tubular motor and the input shaft of the manual device in an embodiment of this utility model.

[0033] Figure 6 This is a schematic diagram of the braking device of the tubular motor according to an embodiment of the present utility model;

[0034] Figure 7 This is a cross-sectional view of the hidden friction component of the braking device of the tubular motor according to an embodiment of the present invention;

[0035] Figure 8 This is an exploded view of the braking device of the tubular motor according to an embodiment of the present invention. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0038] See Figures 1-5A tubular motor includes a motor body 1, a reduction gear 2, a manual control device 3, a travel device 4, a brake device 5, an outer tube 6, and an output section 7. The reduction gear 2, motor body 1, and travel device 4 are arranged sequentially along the axial direction of the tubular motor and are installed inside the outer tube 6. The manual control device 3 is partially adjacent to the travel device 4 on the side away from the motor body 1, and partially passes through the travel device 4 to engage with the motor body 1. The travel device 4 can employ existing technology, such as that disclosed in the prior art patents. The output section 7 extends at least partially outside the outer tube 6, and is respectively located at opposite ends of the outer tube 6 with the manual control device 3. The output section 7 is connected to an external load and is driven by the output of the reduction gear 2, thereby driving the load.

[0039] Braking device 5 is housed within reduction gear 2, and manual device 3 directly engages with motor body 1. Specifically, motor body 1 includes motor shaft 11 with two opposing ends. One end of motor shaft 11 is connected to the input end of reduction gear 2 to drive reduction gear 2, while the other end engages with manual device 3. Manual device 3 includes input shaft 31, end cap 32 located on the outer side of the end of outer tube 6 (the end furthest from reduction gear 2), manual transmission component 33, first bevel gear 341, and second bevel gear 342. Input shaft 31 extends from inside end cap 32 through stroke device 4 to opposite motor shaft 11 of motor body 1, and motor shaft 11 and input shaft 31 are coaxially arranged. Manual transmission component 33 extends outward from inside end cap 32, allowing rotation and linear movement via external tools. In the installed state, the rotation axis of manual transmission component 33 extends vertically. The input shaft 31 and the manual transmission component 33 are in conical contact, so that the linear movement of the manual transmission component 33 can drive the linear movement of the input shaft 31.

[0040] Both the first bevel gear 341 and the second bevel gear 342 are located inside the end cap 32. The first bevel gear 341 is mounted on the manual transmission component 33 and rotates synchronously with it. The second bevel gear 342 is mounted on the input shaft 31 and rotates synchronously with it. The first bevel gear 341 and the second bevel gear 342 mesh. Thus, when the user operates the manual transmission component 33 to rotate it, it can drive the output shaft 31 to rotate. The rotation axes of the two are perpendicular to each other, that is, in the installed state, the rotation axis of the input shaft 31 extends horizontally. The first bevel gear 341 can remain engaged with the second bevel gear 342, or engage when the input shaft 31 moves linearly into position.

[0041] The cooperation between the manual transmission component 33 and the input shaft 31 enables the rotation and linear movement of the input shaft 31. For details, please refer to the applicant's patent: ZL 201120492092.1 (CN202391329U), which will not be elaborated here.

[0042] A stop 12 is provided on the end of the motor shaft 11 adjacent to the input shaft 31. The stop 12 can be approximately disc-shaped, and a stop rod 13 is provided on the stop 12, with the extension direction of the stop rod 13 parallel to the motor shaft 11. A pin 35 is provided on the end of the input shaft 31 adjacent to the motor shaft 11, with the extension direction of the pin 35 perpendicular to the input shaft 31. Thus, through the cooperation of the pin 35 and the stop rod 13, the input shaft 31 can drive the motor shaft 11 to rotate. To ensure stable rotation, there can be two stop rods 13 arranged circumferentially, and the pin 35 can be arranged in a cross shape with the input shaft 31. Alternatively, a first boss (not shown) can be provided on the stop 12, and a second boss (not shown) can be provided on the input shaft 31. After the axial position of the two bosses changes, they can abut or separate circumferentially (here, circumferential direction refers to the circumference of the input shaft 31 or the motor shaft 11), thereby enabling the input shaft 31 to drive the motor shaft 11 to rotate or for the two to separate.

[0043] The braking device 5 is disposed within the reduction gear 2, which employs a gear set and can have at least two stages of reduction. In this embodiment, the reduction gear 2 has four stages of reduction, sequentially from the direction closest to the motor shaft 11 to the direction furthest from the motor shaft 11: first stage reduction 21, second stage reduction 22, third stage reduction 23, and fourth stage reduction 24. Each stage of reduction employs a planetary gear set structure. The braking device 5 is disposed between the first stage reduction 21 and the second stage reduction 22. Alternatively, the braking device 5 can also be disposed between other adjacent two stages of reduction. Alternatively, the braking device 5 can also be disposed between the motor body 1 and the reduction gear 2, or between the reduction gear 2 and the output section 7.

[0044] See Figures 6-8 The braking device 5 includes an input component 51, an output component 52, a coil spring 53, and a friction component 54. The input component 51 is used to receive the torque from the output shaft of the motor shaft 11, and is connected to the output end of the first stage reduction 21 of the reduction device 2 in this embodiment. The output component 52 is used to connect to the input end of the second stage reduction 22 of the reduction device 2 to output torque to the output end of the reduction device 2.

[0045] The input component 51 includes a first disc-shaped body 511 and a first flange 512 formed on the first disc-shaped body 511. The output component 52 includes a second disc-shaped body 521 and a second flange 522 formed on the second disc-shaped body 521. The first disc-shaped body 511 is located near the first-stage reduction gear 21, and the second disc-shaped body 521 is located near the second-stage reduction gear 22. The first flange 512 extends toward the second disc-shaped body 521, and the second flange 522 extends toward the first disc-shaped body 511. The first disc-shaped body 511 receives torque, such as when connected to the output end of the first-stage reduction gear 21 of the reduction gear 2, and the second disc-shaped body 521 outputs torque, such as when connected to the input end of the second-stage reduction gear 22 of the reduction gear 2. The first flange 512 and the second flange 522 are staggered in the circumferential direction, and at least partially overlap along the axial direction of the tubular motor. The aforementioned helical spring 53 is sleeved on the outer periphery of the first flange 512 and the second flange 522. The first disc 511 and the second disc 521 are located on opposite axial sides of the helical spring 53, respectively. The friction component 54 is located on the outer periphery of the helical spring 53 and abuts radially against it. The friction component 54 is fixed relative to the outer tube 6. Normally, the friction component 54 is fixed to the housing (unmarked) of the reduction gear 2, and the housing of the reduction gear 2 is fixed to the outer tube 6. Therefore, the friction component 54 is fixed relative to the outer tube 6.

[0046] The two ends of the helical spring 53 form a first lug 531 and a second lug 532 extending radially inward into the helical spring 53. The first flange 512 of the input component 51 faces the helical spring 53, causing the helical spring 53 to tend to contract radially, thereby reducing the frictional force with the friction component 54. This allows the input component 51 to transmit torque to the output component 52 for output. The first flange 512 of the input component 51 can abut against at least one lug of the helical spring 53. The second flange 522 of the output component 52 faces the helical spring 53, causing the helical spring 53 to tend to expand radially, thereby increasing the frictional force with the friction component 54, thus achieving braking. The first flange 512 of the input component 51 and the second flange 522 of the output component 52 are respectively located on opposite sides of one of the lugs and selectively abut against that lug.

[0047] When the tubular motor is energized, the motor shaft 11 of the motor body 1 rotates. The first flange 512 of the input component 51 abuts against the edge of one of the second flanges 522 of the output component 52. The input component 51 and the output component 52 begin to rotate synchronously, and the first flange 512 abuts against one of the lugs of the coil spring 53, causing the coil spring 53 to contract radially, thereby actuating it. At this time, the brake device 5 does not have a braking effect, and the reduction device 2 outputs torque to the external load through the output part 7. At the same time, the stop lever 13 of the motor shaft 11 and the pin 35 on the input shaft 31 are in an axially separated state, and the rotation of the motor shaft 11 will not affect the manual device 3.

[0048] When the tubular motor is powered off, the output component 52 will rotate a certain distance. At the same time, one of the second flanges 522 of the output component 52 abuts against one of the lugs of the coil spring 53, causing the coil spring 53 to tend to expand radially, thereby increasing the friction with the friction component 54 and thus braking. At this time, the braking device 5 performs the braking function.

[0049] When the manual device 3 is operated manually, the input shaft 31 moves to a position where the pin 35 abuts against the stop bar 13, thereby engaging the input shaft 31 and the motor shaft 11. Thus, the rotation of the input shaft 31 can drive the motor shaft 11 to rotate. The subsequent transmission method is the same as when the tubular motor is energized.

Claims

1. A tubular motor, comprising: The motor body (1) includes a motor shaft (11); The speed reduction device (2) is directly or indirectly connected to the motor shaft (11); Output section (7), the speed reduction device (2) drives the load through the output section (7); manual device (3), which includes an input shaft (31) capable of linearly engaging or disengaging from the motor shaft (11), wherein when the input shaft (31) engages with the motor shaft (11), the input shaft (31) can drive the motor shaft (11) to rotate, and the input shaft (31) and the motor shaft (11) are coaxially arranged; and Braking device (5); characterized in that: The braking device (5) is located inside the deceleration device (2), between the motor body (1) and the deceleration device (2), or between the deceleration device (2) and the output part (7).

2. The tubular motor according to claim 1, characterized in that: The deceleration device (2) includes at least two deceleration stages, and the braking device (5) is disposed between two adjacent deceleration stages.

3. The tubular motor according to claim 1, characterized in that: The braking device (5) includes: The input component (51) is capable of receiving the torque output from the motor shaft (11) and includes a first flange (512); The output component (52) is capable of transmitting torque to the output end of the reduction gear (2), and includes a second flange (522); A helical spring (53), wherein a first flange (512) and a second flange (522) extend into the helical spring (53). When the first flange (512) engages with the helical spring (53), the helical spring (53) contracts radially inward; and when the second flange (522) engages with the helical spring (53), the helical spring (53) expands radially outward. Friction component (54) is located on the outer periphery of the helical spring (53) and abuts radially against the helical spring (53) to provide braking friction force to the helical spring (53).

4. The tubular motor according to claim 3, characterized in that: At least one end of the helical spring (53) forms a lug that extends radially into the helical spring (53), and the first flange (512) of the input component (51) and the second flange (522) of the output component (52) are located on opposite sides of the same lug and selectively abut against the lug.

5. The tubular motor according to claim 3, characterized in that: The input component (51) further includes a first disc (511) that is directly or indirectly connected to the motor shaft (11), and the output component (52) further includes a second disc (521) that transmits torque to the output end of the reduction device (2). The first flange (512) extends from the first disc (511) toward the second disc (521), and the second flange (522) extends from the second disc (521) toward the first disc (511).

6. The tubular motor according to claim 3, characterized in that: The tubular motor also includes an outer tube (6), the speed reduction device (2), the braking device (5) and the motor body (1) are disposed inside the outer tube (6), and the friction component (54) is fixed relative to the outer tube (6).

7. The tubular motor according to claim 1, characterized in that: A stop (12) is provided on the end of the motor shaft (11) adjacent to the input shaft (31). A stop bar (13) is provided on the stop (12). The extension direction of the stop bar (13) is parallel to the motor shaft (11). A pin (35) is provided on the end of the input shaft (31) adjacent to the motor shaft (11). The extension direction of the pin (35) is perpendicular to the input shaft (31). The pin (35) can move linearly to abut or separate from the stop bar (13). When the pin (35) abuts against the stop bar (13), the input shaft (31) can drive the motor shaft (11) to rotate.

8. The tubular motor according to claim 7, characterized in that: The tubular motor also includes an outer tube (6), the speed reduction device (2), the brake device (5) and the motor body (1) are disposed inside the outer tube (6), the manual device (3) also includes an end cap (32) disposed outside the end of the outer tube (6) and a manual transmission component (33) extending from the outside of the outer tube (6) into the end cap (32), the input shaft (31) is partially located inside the outer tube (6) and partially located inside the end cap (32), the manual transmission component (33) can drive the input shaft (31) to move linearly, the manual transmission component (33) is provided with a first bevel tooth (341), the input shaft (31) is provided with a second bevel tooth (342) that can mesh with the first bevel tooth (341), so that the manual transmission component (33) can also drive the input shaft (31) to rotate.

9. The tubular motor according to claim 1, characterized in that: A stop (12) is provided on the end of the motor shaft (11) adjacent to the input shaft (31). A first boss is provided on the stop (12). A second boss is provided on the end of the input shaft (31) adjacent to the motor shaft (11). The second boss can move linearly to abut or separate from the first boss in the circumferential direction. When the first boss and the second boss abut, the input shaft can drive the motor shaft to rotate.

Images