Oil-immersed helical gear tubular motor structure

Abstract

The invention provides an oil-immersed helical gear tubular motor structure, and relates to the technical field of tubular motors, the oil-immersed helical gear tubular motor structure comprises a motor cylinder and a gearbox which are located in a motor sleeve, the motor cylinder is provided with a motor shaft, the gearbox is provided with an output shaft, the gearbox is internally provided with a speed reduction part, and the motor shaft, the speed reduction part and an output gear are all provided with helical gear stripes; 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 the 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, the maintenance cost is low, and the service life is effectively prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of tubular motors, and in particular to an oil-immersed helical gear tubular motor structure. Background Art

[0002] A motor refers to an electromagnetic device that realizes the conversion or transmission of electrical energy according to the law of electromagnetic induction. Its main function is to generate driving torque and convert electrical energy into mechanical energy. It is used as a power source for electrical appliances or various machines. There are many types of motors, such as tubular motors. As a small motor, tubular motors are widely used in rolling doors, rolling shutters, garage doors, awnings, etc., and have good use effects.

[0003] Existing tubular motors usually include a motor and a reducer. The power output shaft of the motor is connected to the reducer. The function of the reducer is to reduce the speed, increase the torque and reduce the load / motor moment of inertia ratio while ensuring precise transmission. Existing reducers usually use planetary gears and planetary carriers to achieve the deceleration effect. Such reducers are called planetary reducers. A planetary reducer usually includes: a planetary carrier, planetary wheels mounted on the planetary carrier for planetary motion, and an inner gear ring meshing with the planetary wheels. The power output shaft of the motor is meshed with the nearest planetary wheel for transmission. After the step-by-step reduction of the planetary wheels of different levels, the last-stage planetary carrier driven by the last first planetary wheel outputs power to the outside. The last-stage planetary carrier leads out the output shaft along its rotating shaft to form the external output of the planetary reducer. For example, the Chinese patent invention patent CN113653770A provides a planetary reduction motor with stable operation, which relates to the field of motor design technology, including a gear box, a motor sleeve, a planetary reduction part and a motor shaft. An outer gear ring is arranged on the outside of the planetary reduction part, and the gear box is provided with a sleeve and an inner gear ring. A first meshing tooth is arranged on the outside of the inner gear ring, a second meshing tooth is arranged on the inside of the sleeve, and a third meshing tooth is arranged on the inside of the outer gear ring. The gear box is provided with an electronic limiter for connecting with the output shaft of the planetary reduction part. The present invention has a simple structure, in which the inner gear ring and the gear box body are separately arranged. The inner gear ring can not only be processed separately, but also can be made of a material different from that of the gear box body to increase wear resistance, and the connection stability to the outer gear ring is better. The inner gear ring can be matched with the end planetary carrier limit to ensure better stability of the planetary deceleration. When the planetary deceleration is guaranteed, the electronic limit can be used to make the deceleration and stroke position accuracy of the tubular motor higher and the safety better.

[0004] However, the planetary reduction structure has the following defects: First, vibration: ordinary planetary gear reduction devices use spur gears. The main disadvantage of spur gears is that there will be vibration during operation, which is unavoidable; second, transmission ratio limitation: due to structural reasons, the minimum single-stage reduction of the planetary reducer is 2.8, and the maximum is generally not more than 12.5; third, high maintenance requirements: because the planetary reducer has more transmission parts, the requirements for its 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. Summary of the invention

[0006] The purpose of the present invention is to provide an oil-immersed helical gear tubular motor structure, which seals the gear box by using a skeleton oil seal and a sealing ring, and then fills the gear box with lubricating oil, and uses a helical gear reduction to replace the planetary reduction in the formed oil seal structure, and provides continuous and stable lubrication, small vibration, low noise, a large helical gear reduction transmission ratio, better deceleration effect, simple structure, low maintenance cost, and effectively extended service life.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: An oil-immersed helical gear tubular motor structure comprises a motor barrel and a gear box located in a motor casing, wherein a motor shaft of the motor barrel extends into the gear box, an output shaft coaxially arranged with the motor shaft is arranged on the gear box, a reduction member for connecting the motor shaft and the output shaft is arranged in the gear box, and helical gear stripes are arranged on the motor shaft, the motor shaft, the reduction member and the output gear; a box cover is arranged on the side of the gear box close to the motor barrel, a first skeleton oil seal is arranged at the connection between the box cover and the motor shaft; a second skeleton oil seal is arranged at the connection between the gear box and the output shaft; a first sealing gasket is arranged at the connection between the gear box and the box cover, and the gear box is filled with lubricating oil.

[0008] As a preferred embodiment of the present invention, the speed reducer includes a functional shaft and a functional gear coaxially arranged with the functional shaft, the output shaft is coaxially arranged with an output gear, the functional shaft is connected to the output gear, and the functional gear is connected to the motor shaft; the functional gear and the functional shaft are both provided with helical gear stripes.

[0009] As a preferred embodiment of the present invention, the number of the speed reducer is at least one, and the number of the gear box is at least one.

[0010] 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 and the output gear, and the gear box includes a first gear box and a second gear box arranged on a side of the first gear box away from the motor barrel; the connection between the first speed reducer and the motor shaft is located in the first gear box, and the connection between the second speed reducer and the output shaft is located in the second gear box.

[0011] As a preferred embodiment of the present invention, a first sealing gasket is provided at the connection between the first gear box and the box cover; and a second sealing gasket is provided at the connection between the second gear box and the first gear box.

[0012] As a preferred embodiment of the present invention, a first axial hole for facilitating the passage of the motor shaft is provided on the box cover; a first bottom plate is provided on the side of the first gear box close to the second gear box; a second bottom plate is provided on the side of the second gear box away from the motor barrel; and a second axial hole for facilitating the passage of the output shaft is provided on the second bottom plate.

[0013] As a preferred embodiment of the present invention, the first gear box is connected to the motor barrel via a first connecting bolt, and the second gear box is connected to the first gear box via a second connecting bolt.

[0014] As a preferred embodiment of the present invention, the number of the first connecting bolt and the number of the second connecting bolt are both at least one, and a first bolt sealing ring is provided at the first connecting bolt; and a second bolt sealing ring is provided at the second connecting bolt.

[0015] As a preferred embodiment of the present invention, a functional gear is provided on the outer side of one end of the motor shaft away from the output shaft, and the functional gear is meshingly connected with an absolute encoder.

[0016] As a preferred embodiment of the present invention, the gear box is an integrally formed part.

[0017] The beneficial effects of the oil-immersed helical gear tubular motor structure of the present invention are: the gear box is sealed by using a skeleton oil seal and a sealing ring, and then the gear box is filled with lubricating oil, and a helical gear reduction is used in the formed oil seal structure instead of a planetary reduction, and continuous and stable lubrication is provided, with small vibration, low noise, a large helical gear reduction transmission ratio, better reduction effect, simple structure, low maintenance cost, and effectively extended service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of an oil-immersed helical gear tubular motor structure of the present invention; Figure 2It is a schematic diagram of the three-dimensional structure of a gear box in one embodiment of an oil-immersed helical gear tubular motor structure of the present invention; Figure 3 It is a schematic diagram of the overall structure under a multi-stage gearbox in one embodiment of an oil-immersed helical gear tubular motor structure of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of a gear box under a multi-stage gear box in one embodiment of an oil-immersed helical gear tubular motor structure of the present invention; Figure 5 It is a schematic diagram of the disassembly of the overall structure under the multi-stage gear box in one embodiment of an oil-immersed helical gear tubular motor structure of the present invention; In the figure: 1. motor barrel, 11. motor shaft, 12. motor, 2. gear box, 201. first gear box, 202. second gear box, 21. first skeleton oil seal, 22. second skeleton oil seal, 23. box cover, 24. first sealing gasket, 25. second sealing gasket, 27. first connecting bolt, 28. second connecting bolt, 3. output shaft, 31. output gear, 4. reduction member, 41. functional shaft, 42. functional gear, 5. motor sleeve. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention, which further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0020] 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 modules and steps set forth in these embodiments do not limit the scope of the present invention.

[0021] At the same time, it should be understood that for the convenience of description, the processes in the drawings are not just performed separately, but multiple steps are performed in an interlaced manner.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0024] Technologies, methods, and systems known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and systems should be considered part of the specification.

[0025] Embodiment 1: Figures 1 to 2 The figure shows only one of the embodiments of the present invention, an oil-immersed helical gear tubular motor structure, an oil-immersed helical gear tubular motor structure, comprising a motor barrel 1 and a gear box 2 located in a motor sleeve 5, the motor shaft 11 of the motor barrel 1 extending into the gear box 2, the gear box 2 is provided with an output shaft 3 coaxially arranged with the motor shaft 11, the gear box 2 is provided with a speed reducer 4 for connecting the motor shaft 11 and the output shaft 3, the motor shaft 11, the speed reducer 4 and the output gear 31 are all provided with helical gear stripes; the gear box 2 is provided with a box cover 23 on the side close to the motor barrel 1, the first skeleton oil seal 21 is provided at the connection between the box cover 23 and the motor shaft 11; the second skeleton oil seal 22 is provided at the connection between the gear box 2 and the output shaft 3; the first sealing gasket 24 is provided at the connection between the gear box 2 and the box cover 23, and the gear box 2 is filled with lubricating oil.

[0026] In the present invention, the entire tubular motor structure includes a motor barrel 1 that accommodates a motor 12 and a gear box 2 for rotating the motor 11 for reducing output. The gear box 2 is connected to the motor barrel 1, and the gear box 2 and the motor barrel 1 are both located in the motor sleeve 5 of the tubular motor. The motor barrel 1 adopts a conventional motor barrel 1 structure, and the gear box 2 is improved. The motor shaft 11 of the motor 12 in the motor barrel 1 extends from the motor barrel 1 through the box cover 23 to the gear box 2. The gear box 2 is provided with an output shaft 3 connected to the motor shaft 11, and the output shaft 3 extends from the end of the gear box 2 away from the motor barrel 1 to drive the rolling door with power.

[0027] In the present invention, 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 box 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 box cover 23, and the gearbox 2 is filled with lubricating oil.

[0028] Since the output shaft 3 and the motor shaft 11 are both rotating parts, the skeleton oil seal that seals the output shaft 3 and the 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 is one of the commonly used sealing ring series. It is mainly used for sealing 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 is composed of three parts, namely, an oil seal rubber elastomer, a reinforcing skeleton, and a self-tightening spring. The rubber elastomer is composed of a bottom, a waist, a cutting edge, and a sealing lip. Usually, the actual size of the inner diameter of the skeleton oil seal will be smaller than the shaft diameter, and it has a certain "interference amount" to make the skeleton oil seal have sealing performance.

[0029] In addition, unlike the conventional planetary reduction tubular motor, the planetary reduction structure is completely replaced by a helical gear reduction structure in the present invention. A reduction member 4 for connecting the motor shaft 11 and the output shaft 3 is arranged in the gear box 2. Due to the characteristics of the tubular motor, the motor shaft 11 and the output shaft 3 need to be coaxially arranged. In order to enable the motor shaft 11 and the output shaft 3 to transmit power and reduce rotation, the motor shaft 11, the reduction member 4 and the output gear 31 are all provided with helical gear stripes. The first stage of helical gear reduction is performed between the motor shaft 11 and the reduction member 4, and the second stage of helical gear reduction is performed between the reduction member 4 and the output shaft 3.

[0030] Here, the reduction member 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; the functional gear 42 and the functional shaft 41 are both 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.

[0031] The gearbox 2, which is equivalent to an oil-immersed and oil-sealed type, can continuously lubricate the motor shaft 11 and the speed reducer 4 and between the speed reducer 4 and the output shaft 3, and can also continuously lubricate the output shaft 3, the motor shaft 11, and the limit bearings of the speed reducer.

[0032] Since the helical gear reduction fully adopted in the present invention is neither a planetary reduction nor a planetary reduction superimposed helical gear structure, the helical gear structure is directly used to replace the planetary reduction, the vibration of the tubular motor is effectively reduced and the noise is low. The single-stage reduction of the helical gear reduction can reach a maximum of 30 or even more, which is much higher than the 10 of the planetary reduction. The transmission ratio range is large and the applicability is wider. There is no need for multiple planetary gears to drive one sun gear. The energy loss is small, which makes the lifting load larger. The structure is simple, the preparation cost is low, the maintenance requirements are lower, and the service life is long.

[0033] The present invention seals the gear box by using a skeleton oil seal and a sealing ring, and then fills the gear box with lubricating oil, and uses a helical gear reduction to replace the planetary reduction in the formed oil seal structure, and provides continuous and stable lubrication, small vibration, low noise, a large helical gear reduction transmission ratio, and better deceleration effect. It has a simple structure, low maintenance cost, and effectively extends the service life.

[0034] Embodiment 2, as Figures 1 to 5 The figure is only one of the embodiments of the present invention. Based on the first embodiment, in an oil-immersed helical gear tubular motor structure of the present invention, the number of the speed reducer 4 is at least one, and the number of the gear box 2 is at least one.

[0035] That is to say, there is a multi-stage (greater than or equal to three) helical gear reduction, and in order to install multiple reduction components 4, the gear box 2 also needs to be set to a multi-stage structure.

[0036] Specifically, the reduction member 4 includes a first reduction member connected to the motor shaft 11 and a second reduction member for connecting the first reduction member and the output gear 31, and the gear box 2 includes a first gear box 201 and a second gear box 202 arranged on the side of the first gear box 201 away from the motor barrel 1; the connection between the first reduction member and the motor shaft 11 is located in the first gear box 201, and the connection between the second reduction member and the output shaft 3 is located in the second gear box 202.

[0037] Here, a first sealing gasket 24 is provided at the connection between the first gearbox 201 and the box cover 23; a second sealing gasket 25 is provided at the connection between the second gearbox 202 and the first gearbox 201; It should be noted that the first sealing gasket 24 and the second sealing gasket 25 are used to seal the gearbox 2 , the first gearbox 201 and the second gearbox 202 are still connected, and lubricating oil exists in the first gearbox 201 and the second gearbox 202 .

[0038] Embodiment three, still as Figures 1 to 5 The figure shown is only one of the embodiments of the present invention. On the basis of any of the above embodiments, in an oil-immersed helical gear tubular motor structure of the present invention, the box cover 23 is provided with a first axial hole 231 for facilitating the passage of the motor shaft 11; a first bottom plate is provided on the side of the first gear box 201 close to the second gear box 202; a second bottom plate is provided on the side of the second gear box 202 away from the motor barrel 1; and a second axial hole is provided on the second bottom plate for facilitating the passage of the output shaft 3.

[0039] 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.

[0040] In the present invention, the first gear box 201 is connected to the motor barrel 1 via a first connecting bolt 27 , and the second gear box 202 is connected to the first gear box 201 via a second connecting bolt 28 .

[0041] Moreover, the number of the first connecting bolt 27 and the number of the second connecting bolt 28 are both at least one, and a first bolt sealing ring is provided at the first connecting bolt 27 ; and a second bolt sealing ring is provided at the second connecting bolt 28 .

[0042] In addition, a functional gear is disposed on the outer side of one end of the motor shaft 11 away from the output shaft 3 , and the functional gear is meshedly connected with an absolute encoder.

[0043] Finally, the gearbox 2 is an integrally formed part.

[0044] The present invention discloses an oil-immersed helical gear tubular motor structure, which seals a gear box by using a skeleton oil seal and a sealing ring, and then fills the gear box with lubricating oil, and uses a helical gear reduction to replace a planetary reduction in the formed oil seal structure, and provides continuous and stable lubrication, small vibration, low noise, a large helical gear reduction transmission ratio, better reduction effect, simple structure, low maintenance cost, and effectively extended service life.

[0045] The present invention is not limited to the above specific implementations, and the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made to the above implementations based on the technical essence of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil-immersed helical gear tubular motor structure, characterized in that: The invention comprises a motor barrel (1) and a gear box (2) located in a motor sleeve (5), wherein a motor shaft (11) of the motor barrel (1) extends into the gear box (2), an output shaft (3) coaxially arranged with the motor shaft (11) is arranged on the gear box (2), a speed reducer (4) for connecting the motor shaft (11) and the output shaft (3) is arranged in the gear box (2), and the motor shaft (11), the speed reducer (4) and the output gear (31) are all provided with helical gear stripes; a box cover (23) is arranged on a side of the gear box (2) close to the motor barrel (1), and a first skeleton oil seal (21) is arranged at the connection between the box cover (23) and the motor shaft (11); a second skeleton oil seal (22) is arranged at the connection between the gear box (2) and the output shaft (3); a first sealing gasket (24) is arranged at the connection between the gear box (2) and the box cover (23), and the gear box (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) comprises 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); and the functional gear (42) and the functional shaft (41) are both 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 speed reducing member (4) is at least one, and the number of the gear box (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) comprises a first speed reducer connected to the motor shaft (11) and a second speed reducer used to connect the first speed reducer and the output gear (31); the gear box (2) comprises a first gear box (201) and a second gear box (202) arranged on a side of the first gear box (201) away from the motor barrel (1); the connection between the first speed reducer and the motor shaft (11) is located in the first gear box (201), and the connection between the second speed reducer and the output shaft (3) is located in the second gear box (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 gear box (201) and the box cover (23); and a second sealing gasket (25) is provided at the connection between the second gear box (202) and the first gear box (201).

6. The oil-immersed helical gear tubular motor structure according to claim 1, characterized in that: The box cover (23) is provided with a first shaft hole (231) for facilitating the passage of the motor shaft (11); a first bottom plate is provided on a side of the first gear box (201) close to the second gear box (202); a second bottom plate is provided on a side of the second gear box (202) away from the motor barrel (1); and a second shaft hole is provided on the second bottom plate for facilitating the passage of the output shaft (3).

7. The oil-immersed helical gear tubular motor structure according to claim 4, characterized in that: The first gear box (201) is connected to the motor barrel (1) via a first connecting bolt (27), and the second gear box (202) is connected to the first gear box (201) via a 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 number of the second connecting bolt (28) are both at least one, and a first bolt sealing ring is provided at the first connecting bolt (27); and a second bolt sealing ring is provided at the second connecting bolt (28).

9. The oil-immersed helical gear tubular motor structure according to claim 1, characterized in that: A functional gear is provided on the outer side of one end of the motor shaft (11) away from the output shaft (3), and the functional gear is meshingly connected with an absolute value encoder.

10. The oil-immersed helical gear tubular motor structure according to claim 1, characterized in that: The gear box (2) is an integrally formed part.

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