Oil-immersed helical gear tubular motor structure

Abstract

The utility model provides an oil-immersed 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, the motor cylinder is provided with a motor shaft, the gear box is provided with an output shaft, a speed reducing part is arranged in the gear box, and helical gear stripes are arranged on the motor shaft, the speed reducing part and an output gear; the gearbox is provided with a box cover, and a first framework oil seal is arranged at the joint of the box cover and the motor shaft; a second framework oil seal is arranged at the joint of the gear box and the output shaft; a first sealing gasket is arranged at the joint of the gearbox and the box cover, and the gearbox is filled with lubricating oil. The gear box is sealed, the gear box is filled with lubricating oil, planetary speed reduction is replaced by helical gear speed reduction in a formed oil seal structure, continuous and stable lubrication is provided, vibration is small, noise is low, the helical gear speed reduction transmission ratio value is large, the better speed reduction effect is achieved, the structure is simple, maintenance cost is low, and the service life is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of tubular motor technology, and in particular, to an oil-immersed 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 will vibrate during operation, which is unavoidable; Second, transmission ratio limitation: due to structural reasons, the minimum single-stage reduction of a planetary reducer is 2.8, and the maximum is generally no more than 12.5; Third, high maintenance requirements: because planetary reducers have many transmission components, the requirements for their lubrication and maintenance are also high. The lubrication system needs to be checked regularly to ensure the normal operation of the equipment.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable and efficient oil-immersed helical gear tubular motor structure. Utility Model Content

[0006] The purpose of this utility model is to provide an oil-immersed helical gear tubular motor structure. The gearbox is sealed by using a skeleton oil seal and a sealing ring, and then lubricating oil is filled into the gearbox. Helical gear reduction is used instead of planetary reduction in the formed oil seal structure, which provides continuous and stable lubrication, low vibration, low noise, large helical gear reduction transmission ratio, better reduction effect, simple structure, low maintenance cost, and effectively extended service life.

[0007] To achieve the above objectives, this utility model employs the following technical solution:

[0008] An oil-immersed 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. An output shaft coaxially arranged with the motor shaft is provided on the gearbox. A reduction component for connecting the motor shaft and the output shaft is provided inside the gearbox. Helical gear stripes are provided on the motor shaft, the reduction component, and the output gear. A cover is provided on the side of the gearbox near the motor cylinder. A first skeleton oil seal is provided at the connection between the cover and the motor shaft. A second skeleton oil seal is provided at the connection between the gearbox and the output shaft. A first sealing gasket is provided at the connection between the gearbox and the cover. The gearbox is filled with lubricating oil.

[0009] As a preferred embodiment of this utility model, the speed reducer includes a functional shaft and a functional gear coaxially arranged with the functional shaft, an output gear coaxially arranged with the output shaft, the functional shaft being connected to the output gear, and the functional gear being connected to the motor shaft; both the functional gear and the functional shaft are provided with helical gear stripes.

[0010] As a preferred embodiment of this invention, the number of the reduction gear and the number of the gearbox are at least one.

[0011] As a preferred embodiment of the present invention, the speed reducer includes a first speed reducer connected to the motor shaft and a second speed reducer for connecting the first speed reducer to the output gear; the gearbox includes a first gearbox and a second gearbox disposed on the side of the first gearbox away from the motor cylinder; the connection point between the first speed reducer and the motor shaft is located inside the first gearbox, and the connection point between the second speed reducer and the output shaft is located inside the second gearbox.

[0012] As a preferred embodiment of this utility model, a first sealing gasket is provided at the connection between the first gearbox and the cover; and a second sealing gasket is provided at the connection between the second gearbox and the first gearbox.

[0013] As a preferred embodiment of this utility model, the cover is provided with a first shaft hole for facilitating the passage of the motor shaft; a first base plate is provided on the side of the first gearbox near the second gearbox; a second base plate is provided on the side of the second gearbox away from the motor cylinder; and a second shaft hole is provided on the second base plate for facilitating the passage of the output shaft.

[0014] As a preferred embodiment of this utility model, the first gearbox is connected to the motor cylinder by a first connecting bolt, and the second gearbox is connected to the first gearbox by a second connecting bolt.

[0015] 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 a first bolt sealing ring is provided at the first connecting bolt; a second bolt sealing ring is provided at the second connecting bolt.

[0016] 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.

[0017] As a preferred embodiment of this utility model, the gearbox is a one-piece molded part.

[0018] The beneficial effects of this utility model of an oil-immersed helical gear tubular motor structure are as follows: by using a skeleton oil seal and sealing ring to seal the gearbox, and then filling the gearbox with lubricating oil, and using helical gear reduction instead of planetary reduction in the formed oil seal structure, continuous and stable lubrication is provided, resulting in low vibration, low noise, large helical gear reduction transmission ratio, better reduction effect, simple structure, low maintenance cost, and effectively extended service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of an oil-immersed helical gear tubular motor according to the present invention.

[0020] Figure 2This is a three-dimensional structural diagram of the gearbox in one embodiment of an oil-immersed helical gear tubular motor structure according to the present invention.

[0021] Figure 3 This is a schematic diagram of the overall structure under the multi-stage gearbox in one embodiment of an oil-immersed helical gear tubular motor structure of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the gearbox under the multi-stage gearbox in one embodiment of the oil-immersed helical gear tubular motor structure of this utility model;

[0023] Figure 5 This is a disassembly diagram of the overall structure under the multi-stage gearbox in one embodiment of an oil-immersed helical gear tubular motor structure of this utility model;

[0024] In the diagram: 1. Motor cylinder, 11. Motor shaft, 12. Motor, 2. Gearbox, 201. First gearbox, 202. Second gearbox, 21. First oil seal, 22. Second oil seal, 23. Cover, 24. First sealing gasket, 25. Second sealing gasket, 27. First connecting bolt, 28. Second connecting bolt, 3. Output shaft, 31. Output gear, 4. Reducer, 41. Functional shaft, 42. Functional gear, 5. Motor sleeve. 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 Figures 1 to 2 The illustration shows only one embodiment of this utility model, an oil-immersed helical gear tubular motor structure, comprising 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. An output shaft 3 coaxially arranged with the motor shaft 11 is provided on the gearbox 2. A reduction component 4 for connecting the motor shaft 11 and the output shaft 3 is provided inside the gearbox 2. Helical gear stripes are provided on the motor shaft 11, the reduction component 4, and the output gear 31. A cover 23 is provided on the side of the gearbox 2 near the motor cylinder 1. A first skeleton oil seal 21 is provided at the connection between the cover 23 and the motor shaft 11. A second skeleton oil seal 22 is provided at the connection between the gearbox 2 and the output shaft 3. A first sealing gasket 24 is provided at the connection between the gearbox 2 and the cover 23. The gearbox 2 is filled with lubricating oil.

[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 through the cover 23 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] In this utility model, the gearbox 2 is in a sealed state and is oil-sealed and oil-immersed. Specifically, a first skeleton oil seal 21 is provided at the connection between the gearbox cover 23 and the motor shaft 11; a second skeleton oil seal 22 is provided at the connection between the gearbox 2 and the output shaft 3; a first sealing gasket 24 is provided at the connection between the gearbox 2 and the gearbox cover 23; and the gearbox 2 is filled with lubricating oil.

[0034] 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.

[0035] Furthermore, unlike conventional planetary geared tubular motors, this invention completely replaces the planetary gear reduction structure with a helical gear reduction structure. The gearbox 2 is equipped with a reduction element 4 for connecting the motor shaft 11 and the output shaft 3. Due to the characteristics of the tubular motor, the motor shaft 11 and the output shaft 3 need to be coaxially arranged. In order for the motor shaft 11 and the output shaft 3 to transmit power and reduce rotation, helical gear stripes are provided on the motor shaft 11, the reduction element 4, and the output gear 31. The motor shaft 11 and the reduction element 4 perform a first-stage helical gear reduction, and the reduction element 4 and the output shaft 3 perform a second-stage helical gear reduction.

[0036] Here, the speed reducer 4 includes a functional shaft 41 and a functional gear 42 coaxially arranged with the functional shaft 41. The output shaft 3 is coaxially arranged with an output gear 31. The functional shaft 41 is connected to the output gear 31, and the functional gear 42 is connected to the motor shaft 11. Both the functional gear 42 and the functional shaft 41 are provided with helical gear stripes. 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.

[0037] The gearbox 2, which is equivalent to an oil-immersed and oil-sealed type, can continuously lubricate the space between the motor shaft 11 and the reducer 4, as well as between the reducer 4 and the output shaft 3. It also continuously lubricates the limit bearings of the output shaft 3, the motor shaft 11, and the reducer.

[0038] Because this utility model uses helical gear reduction, which is neither planetary reduction nor a planetary reduction superimposed with helical gear structure, it directly uses helical gear structure reduction to replace planetary reduction. The vibration of the tubular motor is effectively reduced and the noise is low. The single-stage reduction of helical gear reduction can reach up to 30 or even more, which is much higher than the 10 of planetary reduction. The transmission ratio range is large and the applicability is wider. There is no need for multiple planetary gears to drive a sun gear. The energy loss is small, which makes the load lifting larger. The structure is simple, the manufacturing cost is low, the maintenance requirements are also lower, and the service life is long.

[0039] This invention seals the gearbox using a skeleton oil seal and a sealing ring, then fills the gearbox with lubricating oil. The formed oil seal structure uses helical gear reduction instead of planetary reduction, providing continuous and stable lubrication. It features low vibration and noise, a large helical gear reduction ratio for better deceleration, a simple structure, low maintenance costs, and an effectively extended service life.

[0040] Example 2, as Figures 1 to 5 As shown, this is only one embodiment of the present invention. Based on embodiment one, in the oil-immersed helical gear tubular motor structure of the present invention, the number of the reduction component 4 is at least one, and the number of the gearbox 2 is at least one.

[0041] In other words, there are multiple stages (three or more stages) of helical gear reduction. In order to accommodate the installation of multiple reduction components 4, the gearbox 2 also needs to be set as a multi-stage structure.

[0042] Specifically, the speed reducer 4 includes a first speed reducer connected to the motor shaft 11 and a second speed reducer for connecting the first speed reducer to the output gear 31. The gearbox 2 includes a first gearbox 201 and a second gearbox 202 disposed on the side of the first gearbox 201 away from the motor cylinder 1. The connection between the first speed reducer and the motor shaft 11 is located inside the first gearbox 201, and the connection between the second speed reducer and the output shaft 3 is located inside the second gearbox 202.

[0043] Here, a first sealing gasket 24 is provided at the connection between the first gearbox 201 and the cover 23; a second sealing gasket 25 is provided at the connection between the second gearbox 202 and the first gearbox 201.

[0044] It should be noted that the first sealing gasket 24 and the second sealing gasket 25 serve to seal the gearbox 2. The first gearbox 201 and the second gearbox 202 are still connected, and the lubricating oil exists in the first gearbox 201 and the second gearbox 202.

[0045] Example 3, still as Figures 1 to 5 As shown, this is only one embodiment of the present invention. Based on any of the above embodiments, in the oil-immersed helical gear tubular motor structure of the present invention, the housing cover 23 is provided with a first shaft hole 231 for facilitating the passage of the motor shaft 11; a first base plate is provided on the side of the first gearbox 201 near the second gearbox 202; a second base plate is provided on the side of the second gearbox 202 away from the motor cylinder 1; and a second shaft hole is provided on the second base plate for facilitating the passage of the output shaft 3.

[0046] The first skeleton oil seal 21 is disposed at the first shaft hole, and the second skeleton oil seal 22 is disposed at the second shaft hole.

[0047] In this utility model, the first gearbox 201 is connected to the motor cylinder 1 by a first connecting bolt 27, and the second gearbox 202 is connected to the first gearbox 201 by a second connecting bolt 28.

[0048] Furthermore, there is at least one of each of the first connecting bolt 27 and the second connecting bolt 28, and a first bolt sealing ring is provided at the first connecting bolt 27; a second bolt sealing ring is provided at the second connecting bolt 28.

[0049] Additionally, 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.

[0050] Finally, the gearbox 2 is a one-piece molded part.

[0051] This utility model discloses an oil-immersed helical gear tubular motor structure. The gearbox is sealed by a skeleton oil seal and a sealing ring, and then lubricating oil is filled into the gearbox. Helical gear reduction replaces planetary reduction in the formed oil seal structure, providing continuous and stable lubrication. It has low vibration and low noise. The helical gear reduction has a large transmission ratio and better deceleration effect. The structure is simple, the maintenance cost is low, and the service life is effectively extended.

[0052] 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 structure for an oil-immersed helical gear tubular motor, 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). An output shaft (3) coaxially arranged with the motor shaft (11) is provided on the gearbox (2). A speed reducer (4) for connecting the motor shaft (11) and the output shaft (3) is provided inside the gearbox (2). Helical gear stripes are provided on the motor shaft (11), the speed reducer (4), and the output gear (31). A cover (23) is provided on the side of the gearbox (2) near the motor cylinder (1). A first skeleton oil seal (21) is provided at the connection between the cover (23) and the motor shaft (11). A second skeleton oil seal (22) is provided at the connection between the gearbox (2) and the output shaft (3). A first sealing gasket (24) is provided at the connection between the gearbox (2) and the cover (23). The gearbox (2) is filled with lubricating oil.

2. The oil-immersed helical gear tubular motor structure according to claim 1, characterized in that: The speed reducer (4) includes a functional shaft (41) and a functional gear (42) coaxially arranged with the functional shaft (41). The output shaft (3) is coaxially arranged with an output gear (31). The functional shaft (41) is connected to the output gear (31). The functional gear (42) is connected to the motor shaft (11). Both the functional gear (42) and the functional shaft (41) are provided with helical gear stripes.

3. The oil-immersed helical gear tubular motor structure according to claim 1, characterized in that: The number of the reduction gear (4) is at least one, and the number of the gearbox (2) is at least one.

4. The oil-immersed helical gear tubular motor structure according to claim 1, characterized in that: The speed reducer (4) includes a first speed reducer connected to the motor shaft (11) and a second speed reducer for connecting the first speed reducer to the output gear (31). The gearbox (2) includes a first gearbox (201) and a second gearbox (202) disposed on the side of the first gearbox (201) away from the motor cylinder (1). The connection between the first speed reducer and the motor shaft (11) is located inside the first gearbox (201), and the connection between the second speed reducer and the output shaft (3) is located inside the second gearbox (202).

5. The oil-immersed helical gear tubular motor structure according to claim 4, characterized in that: A first sealing gasket (24) is provided at the connection between the first gearbox (201) and the cover (23); a second sealing gasket (25) is provided at the connection between the second gearbox (202) and the first gearbox (201).

6. The oil-immersed helical gear tubular motor structure according to claim 4, characterized in that: The cover (23) is provided with a first shaft hole (231) for the motor shaft (11) to pass through; the first gearbox (201) is provided with a first base plate on the side near the second gearbox (202); the second gearbox (202) is provided with a second base plate on the side away from the motor cylinder (1); the second base plate is provided with a second shaft hole for the output shaft (3) to pass through.

7. The oil-immersed helical gear tubular motor structure according to claim 4, characterized in that: The first gearbox (201) is connected to the motor cylinder (1) by the first connecting bolt (27), and the second gearbox (202) is connected to the first gearbox (201) by the second connecting bolt (28).

8. The oil-immersed helical gear tubular motor structure according to claim 7, characterized in that: The number of the first connecting bolt (27) and the second connecting bolt (28) is at least one, and a first bolt sealing ring is provided at the first connecting bolt (27); a second bolt sealing ring is provided at the second connecting bolt (28).

9. The structure of an oil-immersed helical gear tubular motor 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.

10. The oil-immersed 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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