Bevel gear tubular motor structure

Abstract

The utility model provides a helical gear tubular motor structure, which relates to the technical field of tubular motors, and comprises a motor cylinder and a gear box which are positioned in a motor sleeve, a motor shaft of the motor cylinder extends into the gear box, an output shaft and a speed reducing part are arranged in the gear box, the output shaft and the motor shaft are coaxially arranged, and the speed reducing part is used for connecting the motor shaft and the output shaft. The speed reduction part comprises a functional shaft and a functional gear coaxially arranged with the functional shaft, the motor shaft is in meshed connection with the functional gear, the output shaft is coaxially provided with an output gear used for being meshed with the functional shaft, and the motor shaft, the functional gear, the functional shaft and the output gear are all of bevel gear structures. According to the helical gear tubular motor structure, planetary speed reduction is directly replaced by helical gear structure speed reduction, the tubular motor vibration is effectively reduced, the noise is low, the transmission ratio range is large, the applicability is wider, the energy loss is small, the lifting load is larger, the structure is simple, the preparation cost is low, the maintenance requirement is lower, and the service life is long.

Description

Technical Field

[0001] This utility model relates to the field of tubular motor technology, and in particular, to a helical gear tubular motor structure. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque and convert electrical energy into mechanical energy, serving as a power source for electrical appliances or various machines. There are many types of electric motors, such as tubular motors. As a small type of motor, tubular motors are widely used in roller shutters, roller blinds, garage doors, awnings, etc., and have good performance.

[0003] Existing tubular motors typically include a motor and a reducer. The motor's power output shaft is connected to the reducer. The function of the reducer is to reduce the speed, increase the torque, and reduce the load / motor rotational inertia ratio while ensuring precise transmission. Existing reducers usually use planetary gears and planet carriers to achieve the speed reduction effect. Such reducers are called planetary reducers. A planetary gear reducer typically includes: a planet carrier, planetary gears mounted on the planet carrier that perform planetary motion, and an internal gear ring that meshes with the planetary gears. The power output shaft of the motor meshes with the nearest planetary gear for transmission. After progressive reduction through different levels of planetary gears, the final planetary carrier, driven by the last first planetary gear, outputs power outward. The final planetary carrier leads out an output shaft along its rotation axis to form the external output of the planetary gear reducer. For example, Chinese invention patent CN113653770A provides a planetary geared motor with stable operation, relating to the field of motor design technology. It includes a gearbox, a motor sleeve, a planetary reduction section, and a motor shaft. An external gear ring is provided on the outer side of the planetary reduction section. The gearbox is provided with a sleeve and an internal gear ring. The outer side of the internal gear ring is provided with a first meshing tooth, the inner side of the sleeve is provided with a second meshing tooth, and the inner side of the external gear ring is provided with a third meshing tooth. The gearbox is provided with an electronic limiter for connecting to the output shaft of the planetary reduction section. This invention has a simple structure, separating the internal gear ring from the gearbox body. The internal gear ring can not only be machined separately, but also be made of a different material than the gearbox body to increase wear resistance, resulting in better connection stability with the external gear ring. Furthermore, the internal gear ring can be matched with the end planetary carrier for limiting, which can ensure better planetary deceleration stability. With planetary deceleration guaranteed, the combination with electronic limiting makes the deceleration and stroke position accuracy of the tubular motor higher and the safety better.

[0004] However, planetary gear reducers have the following drawbacks: First, vibration: ordinary planetary gear reducers use spur gears, and the main disadvantage of spur gears is that they vibrate during operation, which is unavoidable. Second, transmission ratio limitation: due to structural reasons, the minimum single-stage reduction ratio of a planetary reducer is 2.8, and the maximum is generally no more than 12.5. Third, energy loss: multiple planetary gears are meshed with a sun gear, that is, rotation is transmitted through multiple pairs of teeth meshing. Since the stress is limited by the meshing effect of individual teeth in the cycle, energy is wasted. Fourth, higher manufacturing cost: planetary reducers are more expensive than ordinary reducers. Fifth, high maintenance requirements: because planetary reducers have many transmission components, their lubrication and maintenance requirements are also high. The lubrication system needs to be checked regularly to ensure the normal operation of the equipment.

[0005] To address the first two shortcomings mentioned above, some current planetary geared tubular motors employ helical gear structures. For example, Chinese utility model patent CN205639560U discloses a tubular motor gearbox, including an inner gear sleeve, a planetary gear mechanism disposed within the inner gear sleeve, an inner gear sleeve cover disposed at the top of the inner gear sleeve, a connector inserted into the inner gear sleeve cover, and an inner gear sleeve seat disposed at the bottom of the connector. The planetary gear mechanism includes a first-stage planetary gear assembly, a second-stage planetary gear assembly, and a third-stage planetary gear assembly. The first-stage planetary gear of the first-stage planetary gear assembly is a helical gear, and the inner side of the inner gear sleeve has internal helical teeth corresponding to the first-stage planetary gear. A first backlash-eliminating pad is provided between the first-stage planetary support and the inner gear sleeve, and a second backlash-eliminating pad is provided between the second-stage planetary support and the inner gear sleeve. A first stainless steel washer is fitted on the output shaft, with the top surface of the first stainless steel washer fitting against the bottom surface of the inner gear sleeve seat. A retaining spring is also fitted on the output shaft, with the top surface of the retaining spring fitting against the bottom surface of the first stainless steel washer. This utility model has the advantage of low operating noise.

[0006] The structure of the above-mentioned utility model partially solves the first two defects mentioned above, but the latter three defects still exist. Furthermore, due to the superposition of planetary reduction and helical gear structure, the degree of vibration reduction is still insufficient, and the effect of increasing the transmission reduction ratio is not good enough.

[0007] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable and efficient helical gear tubular motor structure. Utility Model Content

[0008] The purpose of this utility model is to provide a helical gear tubular motor structure that directly uses a helical gear structure to reduce speed instead of a planetary gear reducer. The tubular motor effectively reduces vibration and noise, has a wide transmission ratio range and wider applicability, low energy loss, resulting in a larger lifting load, simple structure, low manufacturing cost, lower maintenance requirements, and long service life.

[0009] To achieve the above objectives, this utility model employs the following technical solution:

[0010] A helical gear tubular motor structure includes a motor cylinder and a gearbox located within a motor sleeve. The motor shaft of the motor cylinder extends into the gearbox. The gearbox contains an output shaft coaxially arranged with the motor shaft and a reduction gear for connecting the motor shaft and the output shaft. The reduction gear includes a functional shaft and a functional gear coaxially arranged with the functional shaft. The motor shaft meshes with the functional gear. The output shaft has an output gear coaxially arranged for meshing with the functional shaft. Helical gear stripes are provided on the motor shaft, the functional gear, the functional shaft, and the output gear.

[0011] As a preferred embodiment of this invention, the gearbox is provided with a top plate on the side near the motor cylinder; the top plate is provided with a first shaft hole for facilitating the passage of the motor shaft.

[0012] As a preferred embodiment of the present invention, a base plate is provided on the side of the gearbox away from the motor cylinder, and a second shaft hole is provided on the base plate to facilitate the passage of the output shaft.

[0013] As a preferred embodiment of this utility model, a first limiting bearing is provided at the end of the functional shaft away from the functional gear, a second limiting bearing is provided at the end of the functional gear away from the functional shaft, a first limiting cylinder is provided on the base plate to facilitate the installation of the first limiting bearing, and a second limiting cylinder is provided on the top plate to facilitate the installation of the second limiting bearing.

[0014] As a preferred embodiment of this utility model, a first skeleton oil seal is provided at the first shaft hole, a second skeleton oil seal is provided at the second shaft hole, a sealing ring is provided at the connection between the gearbox and the base plate, and the gearbox is filled with lubricating oil.

[0015] As a preferred embodiment of this utility model, the gearbox is connected to the motor cylinder by a first connecting bolt, and the gearbox is connected to the base plate by a second connecting bolt.

[0016] As a preferred embodiment of this utility model, the number of the first connecting bolt and the second connecting bolt is at least one, and the gearbox is provided with a bolt sleeve for facilitating the installation of the second connecting bolt.

[0017] As a preferred embodiment of this invention, a functional gear is provided on the outer side of the end of the motor shaft away from the output shaft, and the functional gear is meshed with an absolute encoder.

[0018] As a preferred embodiment of this utility model, both the motor cylinder and the base plate are provided with fixing bolts for connecting to the motor sleeve.

[0019] As a preferred embodiment of this utility model, the gearbox is a one-piece molded part.

[0020] The beneficial effects of this utility model of a helical gear tubular motor structure are as follows: directly using a helical gear structure to reduce speed instead of a planetary gear reducer, effectively reducing vibration and noise in the tubular motor; the maximum single-stage reduction of the helical gear reducer can reach 30 or even higher, far exceeding the 10 of the planetary reducer; the transmission ratio range is large and the applicability is wider; there is no need for multiple planetary gears to drive a sun gear; under the same reduction stage and the same reduction ratio, the helical gear reducer structure has less energy loss than the planetary reducer structure, resulting in a larger load capacity; the structure is simple, the manufacturing cost is low, the maintenance requirements are lower, and the service life is long. Attached Figure Description

[0021] Fig. 1 This is a schematic diagram of the overall structure of one embodiment of the helical gear tubular motor structure of this utility model;

[0022] Fig. 2 This is a three-dimensional disassembly diagram of an embodiment of a helical gear tubular motor structure according to the present invention.

[0023] Fig. 3 This is a three-dimensional structural diagram of the gearbox in one embodiment of the helical gear tubular motor structure of this utility model;

[0024] In the diagram: 1. Motor cylinder, 11. Motor shaft, 12. Motor, 2. Gearbox, 21. Top plate, 22. Bottom plate, 23. First shaft hole, 25. First limiting cylinder, 27. First connecting bolt, 28. Second connecting bolt, 29. Bolt cylinder, 3. Output shaft, 31. Output gear, 4. Reducer, 41. Functional shaft, 42. Functional gear, 43. First limiting bearing, 44. Second limiting bearing, 5. Motor sleeve, 51. Fixing bolt. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement and steps of the modules and steps set forth in these embodiments do not limit the scope of the present invention.

[0027] At the same time, it should be understood that, for ease of description, the process shown in the attached diagram is not performed in isolation, but rather involves multiple steps that overlap.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0030] Techniques, methods, and systems known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0031] Example 1: As Figs. 1 to 3 The diagram shown is merely one embodiment of this utility model. A helical gear tubular motor structure includes a motor cylinder 1 and a gearbox 2 located within a motor sleeve 5. The motor shaft 11 of the motor cylinder 1 extends into the gearbox 2. The gearbox 2 contains an output shaft 3 coaxially arranged with the motor shaft 11 and a reduction gear 4 for connecting the motor shaft 11 and the output shaft 3. The reduction gear 4 includes a functional shaft 41 and a functional gear 42 coaxially arranged with the functional shaft 41. The motor shaft 11 meshes with the functional gear 42. The output shaft 3 coaxially has an output gear 31 for meshing with the functional shaft 41. Helical gear stripes are provided on the motor shaft 11, the functional gear 42, the functional shaft 41, and the output gear 31.

[0032] In this utility model, the entire tubular motor structure includes a motor cylinder 1 that houses the motor 12 and a gearbox 2 that reduces the speed of the motor 11. The gearbox 2 is connected to the motor cylinder 1, and both the gearbox 2 and the motor cylinder 1 are located inside the motor sleeve 5 of the tubular motor. The motor cylinder 1 adopts a conventional motor cylinder 1 structure, while the gearbox 2 has been improved. The motor shaft 11 of the motor 12 in the motor cylinder 1 extends from the motor cylinder 1 into the gearbox 2. The gearbox 2 is provided with an output shaft 3 connected to the motor shaft 11. The output shaft 3 then extends from the end of the gearbox 2 away from the motor cylinder 1 to drive the roller shutter door.

[0033] Unlike conventional planetary geared tubular motors, this invention completely replaces the planetary gear reduction structure with a helical gear reduction structure. Specifically, the gearbox 2 is equipped with an output shaft 3 coaxially arranged with the motor shaft 11 and a reduction component 4 for connecting the motor shaft 11 and the output shaft 3. The reduction component 4 includes a functional shaft 41 and a functional gear 42 coaxially arranged with the functional shaft 41. The motor shaft 11 is meshed with the functional gear 42. The output shaft 3 is coaxially arranged with an output gear 31 for meshing with the functional shaft 41. Helical gear stripes are provided on the motor shaft 11, the functional gear 42, the functional shaft 41, and the output gear 31.

[0034] Here, the outer diameter of the functional gear 42 is larger than the outer diameter of the motor shaft 11, and the outer diameter of the output gear 31 is larger than the outer diameter of the functional shaft 41.

[0035] Due to the characteristics of tubular motors, the motor shaft 11 and the output shaft 3 need to be coaxial. In order for the motor shaft 11 and the output shaft 3 to transmit power and reduce rotation speed, a transitional reducer 4 is needed between the motor shaft 11 and the output shaft 3. The motor shaft 11, the output shaft 3 and the reducer 4 are all connected by helical gears, so that the motor shaft 11 and the reducer 4 undergo the first helical gear reduction, and the reducer 4 and the output shaft 3 undergo the second helical gear reduction.

[0036] Because this utility model uses a two-stage helical gear reduction system, which is neither a planetary reduction nor a planetary reduction superimposed with a helical gear structure, it directly uses a helical gear structure to reduce the speed of the tubular motor, effectively reducing vibration and noise. The single-stage reduction of the helical gear can reach a maximum of 30 or even higher, which is much higher than the 10 of the planetary reduction. It has a wide range of transmission ratios and is more applicable. It does not require multiple planetary gears to drive a sun gear, resulting in less energy loss and a larger lifting load. It has a simple structure, low manufacturing cost, lower maintenance requirements, and a long service life.

[0037] Example 2, still as Figs. 1 to 3 As shown, this is only one embodiment of the present utility model. Based on the first embodiment, in the helical gear tubular motor structure of the present utility model, the gearbox 2 is provided with a top plate 21 on the side near the motor cylinder 1; the top plate 21 is provided with a first shaft hole 23 for facilitating the passage of the motor shaft 11.

[0038] Similarly, a base plate 22 is provided on the side of the gearbox 2 away from the motor cylinder 1, and a second shaft hole is provided on the base plate 22 to facilitate the passage of the output shaft 3.

[0039] In this utility model, a first limiting bearing 43 is provided at the end of the functional shaft 41 away from the functional gear 42, and a second limiting bearing 44 is provided at the end of the functional gear 42 away from the functional shaft 41. A first limiting cylinder 25 is provided on the bottom plate 22 to facilitate the installation of the first limiting bearing 43, and a second limiting cylinder is provided on the top plate 21 to facilitate the installation of the second limiting bearing 44.

[0040] In other words, the two ends of the speed reducer 4 are respectively limited and connected by the first limiting cylinder 25 and the second limiting cylinder, making the speed reducer run more stably, without shaking, and effectively reducing noise.

[0041] Example 3, still as Figs. 1 to 3 The above illustration is only one embodiment of the present invention. Based on any of the above embodiments, in the helical gear tubular motor structure of the present invention, a first skeleton oil seal is provided at the first shaft hole 23, a second skeleton oil seal is provided at the second shaft hole, a sealing ring is provided at the connection between the gearbox 2 and the base plate 22, and the gearbox 2 is filled with lubricating oil; the transmission parts in the entire gearbox 2 are effectively oil-sealed for continuous and stable lubrication, further reducing the maintenance requirements of the entire tubular motor, effectively extending its service life, and improving its safety and stability.

[0042] Since both output shaft 3 and motor shaft 11 are rotating parts, the skeleton oil seal, which seals the output shaft 3 and motor shaft 11, is a representative seal that is widely used in rotating shaft parts. The skeleton oil seal is a type of seal and one of the commonly used sealing ring series. It is mainly used for sealing the oil in mechanical components. The skeleton oil seal is a component used to prevent oil from leaking from the gaps in the machine. The skeleton oil seal consists of three parts: the oil seal rubber elastomer, the reinforcing skeleton, and the self-tightening spring. The rubber elastomer consists of the bottom, waist, cutting edge, and sealing lip. Usually, the actual inner diameter of the skeleton oil seal is smaller than the shaft diameter, with a certain "interference fit" to enable the skeleton oil seal to have sealing performance.

[0043] The gearbox 2, which is equivalent to an oil-immersed and oil-sealed type, can continuously lubricate the motor shaft 11 and the reducer 4, as well as the reducer 4 and the output shaft 3. It also continuously lubricates the output shaft 3, the motor shaft 11, the first limit bearing 43, and the second limit bearing 44.

[0044] Example 4, still as Figs. 1 to 3 As shown, this is only one embodiment of the present utility model. Based on any of the above embodiments, in the helical gear tubular motor structure of the present utility model, the gearbox 2 is connected to the motor cylinder 1 by the first connecting bolt 27, and the gearbox 2 is connected to the base plate 22 by the second connecting bolt 28.

[0045] Of course, there is at least one first connecting bolt 27 and one second connecting bolt 28, and the gearbox 2 is provided with a bolt sleeve 29 for facilitating the installation of the second connecting bolt 28.

[0046] It should be noted that sealing washers are provided at both the first connecting bolt 27 and the second connecting bolt 28 to further ensure the oil sealing effect of the gearbox 2.

[0047] Furthermore, a functional gear is provided on the outer side of the end of the motor shaft 11 away from the output shaft 3. The functional gear is meshed with an absolute encoder, which limits the travel of the motor shaft 11, thus limiting the upper and lower movement of the roller shutter door.

[0048] Furthermore, both the motor cylinder 1 and the base plate 22 are provided with fixing bolts 51 for connecting with the motor sleeve 5. In fact, the end structure of the motor cylinder 1 away from the gearbox 2 is provided with multiple fixing bolts 51 for connecting with the motor sleeve 5, and the side of the base plate 22 is also provided with multiple fixing bolts 51 for connecting with the motor sleeve 5.

[0049] Finally, the gearbox 2 is a one-piece molded part. In fact, the gearbox 2 is a one-piece molded carbon steel alloy part, which has high shock resistance and bending resistance and good stability.

[0050] This utility model discloses a helical gear tubular motor structure, which directly uses a helical gear structure to reduce speed instead of a planetary gear reducer. The tubular motor effectively reduces vibration and noise, has a wide transmission ratio range and wider applicability, and has low energy loss, resulting in a larger lifting load. It also features a simple structure, low manufacturing cost, lower maintenance requirements, and a long service life.

[0051] This utility model is not limited to the specific embodiments described above, and various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A helical gear tubular motor structure, characterized in that: The device includes a motor cylinder (1) and a gearbox (2) located inside a motor sleeve (5). The motor shaft (11) of the motor cylinder (1) extends into the gearbox (2). The gearbox (2) is provided with an output shaft (3) coaxially arranged with the motor shaft (11) and a speed reducer (4) for connecting the motor shaft (11) and the output shaft (3). The speed reducer (4) includes a functional shaft (41) and a functional gear (42) coaxially arranged with the functional shaft (41). The motor shaft (11) is meshed with the functional gear (42). The output shaft (3) is coaxially arranged with an output gear (31) for meshing with the functional shaft (41). The motor shaft (11), the functional gear (42), the functional shaft (41) and the output gear (31) are all provided with helical gear stripes.

2. The helical gear tubular motor structure according to claim 1, characterized in that: The gearbox (2) has a top plate (21) on the side near the motor cylinder (1); the top plate (21) has a first shaft hole (23) for the motor shaft (11) to pass through.

3. The helical gear tubular motor structure according to claim 2, characterized in that: The gearbox (2) has a base plate (22) on the side away from the motor cylinder (1), and the base plate (22) has a second shaft hole for the output shaft (3) to pass through.

4. The helical gear tubular motor structure according to claim 3, characterized in that: A first limiting bearing (43) is provided at one end of the functional shaft (41) away from the functional gear (42), and a second limiting bearing (44) is provided at one end of the functional gear (42) away from the functional shaft (41). A first limiting cylinder (25) is provided on the base plate (22) to facilitate the installation of the first limiting bearing (43), and a second limiting cylinder is provided on the top plate (21) to facilitate the installation of the second limiting bearing (44).

5. The helical gear tubular motor structure according to claim 4, characterized in that: A first skeleton oil seal is provided at the first shaft hole (23), a second skeleton oil seal is provided at the second shaft hole, a sealing ring is provided at the connection between the gearbox (2) and the base plate (22), and the gearbox (2) is filled with lubricating oil.

6. The helical gear tubular motor structure according to claim 3, characterized in that: The gearbox (2) is connected to the motor cylinder (1) by the first connecting bolt (27), and the gearbox (2) is connected to the base plate (22) by the second connecting bolt (28).

7. The helical gear tubular motor structure according to claim 6, characterized in that: The number of the first connecting bolt (27) and the second connecting bolt (28) is at least one, and the gearbox (2) is provided with a bolt sleeve (29) for facilitating the installation of the second connecting bolt (28).

8. The helical gear tubular motor structure according to claim 1, characterized in that: A functional gear is provided on the outer side of the end of the motor shaft (11) away from the output shaft (3), and the functional gear is meshed with an absolute encoder.

9. The helical gear tubular motor structure according to claim 3, characterized in that: Both the motor cylinder (1) and the base plate (22) are provided with fixing bolts (51) for connecting with the motor sleeve (5).

10. The helical gear tubular motor structure according to claim 1, characterized in that: The gearbox (2) is a one-piece molded part.

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