Bevel gear tubular motor structure

Abstract

The invention provides a helical gear tubular motor structure, and relates to the technical field of tubular motors, the helical gear tubular motor structure comprises a motor cylinder and a gear box which are located in a motor sleeve, a motor shaft of the motor cylinder extends into the gear box, and the gear box is internally provided with an output shaft coaxially arranged with the motor shaft and a speed reduction part 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, vibration of a tubular motor is effectively reduced, noise is low, the transmission ratio range is large, the applicability is wider, energy loss is small, the lifting load is larger, the structure is simple, the manufacturing cost is low, the maintenance requirement is lower, and the service life is long.

Description

Technical Field

[0001] The present invention relates to the technical field of tubular motors, and in particular to a 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, energy loss: multiple planetary gears are meshed and connected with a sun gear, that is, rotation is transmitted through multiple pairs of teeth meshing. Since the stress is subject to the meshing action of a single tooth in the cycle, energy will be wasted; fourth, the preparation cost is relatively high: planetary reducers are more expensive than ordinary reducers; fifth, high maintenance requirements: since planetary reducers have more transmission parts, 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] In view of the above first two defects, some planetary reduction tubular motors now adopt a helical gear structure. For example, Chinese utility model patent CN205639560U discloses a tubular motor reduction box, including an inner gear sleeve, a planetary gear mechanism arranged in the inner gear sleeve, an inner gear sleeve cover arranged at the top of the inner gear sleeve, a coupler inserted on the inner gear sleeve cover, and an inner gear sleeve seat arranged at the bottom of the coupler, wherein the planetary gear mechanism includes a primary planetary gear assembly, a secondary planetary gear assembly, and a tertiary planetary gear assembly; the primary planetary gear of the primary planetary gear assembly is a helical gear, and the inner side of the inner gear sleeve has an inner helical tooth arranged corresponding to the primary planetary gear; a first anti-backlash pad is arranged between the primary planetary bracket and the inner gear sleeve, and a second anti-backlash pad is arranged between the secondary planetary bracket and the inner gear sleeve; a first stainless steel gasket is sleeved on the output shaft, and the top surface of the first stainless steel gasket is in contact with the bottom surface of the inner gear sleeve seat; a retaining spring is also sleeved on the output shaft, and the top surface of the retaining spring is in contact with the bottom surface of the first stainless steel gasket. The utility model has the advantage of low noise in use.

[0006] The structure of the above utility model partially solves the first two defects mentioned above, but the last three defects still exist, and due to the superposition of planetary reduction and helical gear structure, the vibration reduction degree is still insufficient, and the transmission reduction ratio expansion effect 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. Summary of the invention

[0008] The purpose of the present invention is to provide a helical gear tubular motor structure, which directly adopts the helical gear structure to replace the planetary reduction gear, effectively reduces the vibration of the tubular motor and has low noise, a large transmission ratio range and wider applicability, small energy loss so that the lifting load is larger, simple structure, low preparation cost, lower maintenance requirements and long service life.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions: A helical gear tubular motor structure, comprising a motor barrel and a gear box located in a motor sleeve, wherein a motor shaft of the motor barrel extends into the gear box, wherein an output shaft coaxially arranged with the motor shaft and a reduction member for connecting the motor shaft and the output shaft are arranged in the gear box, wherein the reduction member comprises a functional shaft and a functional gear coaxially arranged with the functional shaft, wherein the motor shaft is meshingly connected with the functional gear, wherein an output gear coaxially arranged with the output shaft for meshing with the functional shaft, wherein the motor shaft, the functional gear, the functional shaft and the output gear are all provided with helical gear stripes.

[0010] As a preferred embodiment of the present invention, a top plate is provided on a side of the gear box close to the motor barrel; a first shaft hole for facilitating the passage of the motor shaft is provided on the top plate.

[0011] As a preferred embodiment of the present invention, a bottom plate is provided on a side of the gear box away from the motor barrel, and a second shaft hole for facilitating the output shaft to pass through is provided on the bottom plate.

[0012] As a preferred embodiment of the present invention, a first limit bearing is provided at one end of the functional shaft away from the functional gear, a second limit bearing is provided at one end of the functional gear away from the functional shaft, a first limit cylinder for facilitating the installation of the first limit bearing is provided on the bottom plate, and a second limit cylinder for facilitating the installation of the second limit bearing is provided on the top plate.

[0013] As a preferred embodiment of the present invention, 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 gear box and the base plate, and the gear box is filled with lubricating oil.

[0014] As a preferred embodiment of the present invention, the gear box is connected to the motor barrel via a first connecting bolt, and the gear box is connected to the base plate via a second connecting bolt.

[0015] 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 the gear box is provided with a bolt barrel for facilitating the installation of the second connecting bolt.

[0016] 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.

[0017] As a preferred embodiment of the present invention, the motor barrel and the base plate are both provided with fixing bolts for connecting with the motor sleeve.

[0018] As a preferred embodiment of the present invention, the gear box is an integrally formed part.

[0019] The beneficial effects of the helical gear tubular motor structure of the present invention are: the helical gear structure is directly used to replace the planetary reduction gear, 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 10 of the planetary reduction gear, the transmission ratio range is large and the applicability is wider, and there is no need for multiple planetary gears to drive a sun gear. Under the same level of reduction and the normal reduction ratio, the helical gear reduction structure has less energy loss than the planetary reduction structure, so that the lifting load is larger, the structure is simple, the preparation cost is low, the maintenance requirements are also lower, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a helical gear tubular motor structure of the present invention; Figure 2 It is a three-dimensional disassembled structural schematic diagram of an embodiment of a helical gear tubular motor structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of a gear box in one embodiment of a helical gear tubular motor structure of the present invention; In the figure: 1. motor cylinder, 11. motor shaft, 12. motor, 2. gear box, 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. reduction gear, 41. functional shaft, 42. functional gear, 43. first limiting bearing, 44. second limiting bearing, 5. motor sleeve, 51. fixing bolt. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Embodiment 1: Figures 1 to 3 The figure is only one of the embodiments of the present invention, a helical gear tubular motor structure, a helical gear tubular motor structure, including a motor barrel 1 and a gear box 2 located in a motor sleeve 5, the motor shaft 11 of the motor barrel 1 extends into the gear box 2, the gear box 2 is provided with an output shaft 3 coaxially arranged with the motor shaft 11 and a reduction member 4 for connecting the motor shaft 11 and the output shaft 3, the reduction member 4 includes a functional shaft 41 and a functional gear 42 coaxially arranged with the functional shaft 41, the motor shaft 11 is meshedly connected with the functional gear 42, the output shaft 3 is coaxially provided with an output gear 31 for meshing with the functional shaft 41, and the motor shaft 11, the functional gear 42, the functional shaft 41 and the output gear 31 are all provided with helical gear stripes.

[0028] 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 the 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 to the gear box 2. The gear box 2 is provided with an output shaft 3 connected to the motor shaft 11. 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.

[0029] Different from the conventional planetary reduction tubular motor, the planetary reduction structure is completely replaced by a helical gear reduction structure in the present invention, specifically: the gear box 2 is provided with an output shaft 3 coaxially arranged with the motor shaft 11 and a reduction member 4 for connecting the motor shaft 11 and the output shaft 3, the reduction member 4 includes a functional shaft 41 and a functional gear 42 coaxially arranged with the functional shaft 41, the motor shaft 11 is meshed and connected with the functional gear 42, the output shaft 3 is coaxially provided with an output gear 31 for meshing with the functional shaft 41, and the motor shaft 11, the functional gear 42, the functional shaft 41 and the output gear 31 are all provided with helical gear stripes.

[0030] 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] 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 speed, a transitional reduction member 4 is required between the motor shaft 11 and the output shaft 3. The motor shaft 11, the output shaft 3 and the reduction member 4 are all connected by helical gear reduction, so that the first helical gear reduction is performed between the motor shaft 11 and the reduction member 4, and the second helical gear reduction is performed between the reduction member 4 and the output shaft 3.

[0032] Since the helical gear two-stage reduction is fully adopted in the present invention, it 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] Embodiment 2, still as Figures 1 to 3 The figure shown is only one of the embodiments of the present invention. On the basis of the first embodiment, in a helical gear tubular motor structure of the present invention, a top plate 21 is provided on the side of the gear box 2 close to the motor barrel 1; a first shaft hole 23 is provided on the top plate 21 for facilitating the passage of the motor shaft 11.

[0034] Similarly, a bottom plate 22 is provided on a side of the gear box 2 away from the motor barrel 1 , and a second shaft hole for facilitating the output shaft 3 to pass through is provided on the bottom plate 22 .

[0035] In the present invention, a first limit bearing 43 is provided at one end of the functional shaft 41 away from the functional gear 42, a second limit bearing 44 is provided at one end of the functional gear 42 away from the functional shaft 41, a first limit cylinder 25 for facilitating the installation of the first limit bearing 43 is provided on the bottom plate 22, and a second limit cylinder for facilitating the installation of the second limit bearing 44 is provided on the top plate 21.

[0036] That is to say, the two ends of the speed reducer 4 are respectively connected by the first limiting cylinder 25 and the second limiting cylinder for limiting installation, so that the speed reducer runs more stably without shaking, and the noise is effectively reduced.

[0037] Embodiment three, still as Figures 1 to 3 The figure is only one of the embodiments of the present invention. On the basis of any of the above embodiments, in a helical gear tubular motor structure of the present invention, a first skeleton oil seal is arranged at the first shaft hole 23, a second skeleton oil seal is arranged at the second shaft hole, a sealing ring is arranged at the connection between the gear box 2 and the base plate 22, and the gear box 2 is filled with lubricating oil; the transmission parts in the entire gear box 2 are effectively oil-sealed for continuous and stable lubrication, the maintenance requirements of the entire tubular motor are further reduced, the service life is effectively extended, and the safety and stability are better.

[0038] 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.

[0039] The gearbox 2 which is equivalent to an oil-immersed and oil-sealed type can continuously lubricate the motor shaft 11 and the reduction member 4 and between the reduction member 4 and the output shaft 3 , and also continuously lubricate the output shaft 3 , the motor shaft 11 , the first limit bearing 43 , and the second limit bearing 44 .

[0040] Embodiment 4, still as Figures 1 to 3 The figure shown is only one embodiment of the present invention. Based on any of the above embodiments, in a helical gear tubular motor structure of the present invention, the gear box 2 is connected to the motor barrel 1 through a first connecting bolt 27, and the gear box 2 is connected to the base plate 22 through a second connecting bolt 28.

[0041] Of course, the number of the first connecting bolt 27 and the second connecting bolt 28 is at least one, and the gear box 2 is provided with a bolt barrel 29 for facilitating the installation of the second connecting bolt 28 .

[0042] It should be noted that sealing washers are provided at the first connecting bolt 27 and the second connecting bolt 28 to further ensure the oil sealing effect of the gear box 2.

[0043] In addition, a functional gear is arranged 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, which limits the stroke of the motor shaft 11, that is, limits the upper and lower positions of the rolling door.

[0044] Furthermore, the motor barrel 1 and the base plate 22 are both provided with fixing bolts 51 for connecting with the motor sleeve 5. In fact, a plurality of fixing bolts 51 connected with the motor sleeve 5 are provided on the barrel end structure of the motor barrel 1 away from the gear box 2, and a plurality of fixing bolts 51 connected with the motor sleeve 5 are also provided on the side of the base plate 22.

[0045] Finally, the gear box 2 is an integrally formed part. In fact, the gear box 2 is an integrally formed carbon steel alloy part with high shockproof and bending resistance and good stability.

[0046] The present invention discloses a helical gear tubular motor structure, which directly adopts a helical gear structure to reduce speed instead of a planetary reducer. The vibration of the tubular motor is effectively reduced and the noise is low. The transmission ratio range is large and the applicability is wider. The energy loss is small so that the lifting load is larger. The structure is simple, the preparation cost is low, the maintenance requirement is also lower, and the service life is long.

[0047] 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. A 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); 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) and a speed reducer (4) for connecting the motor shaft (11) and the output shaft (3) are arranged in the gear box (2); the speed reducer (4) comprises a functional shaft (41) and a functional gear (42) coaxially arranged with the functional shaft (41); the motor shaft (11) is meshingly connected with the functional gear (42); the output shaft (3) is coaxially arranged with an output gear (31) for meshing with the functional shaft (41); and 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. A helical gear tubular motor structure according to claim 1, characterized in that: A top plate (21) is provided on a side of the gear box (2) close to the motor cylinder (1); a first shaft hole (23) for facilitating the motor shaft (11) to pass through is provided on the top plate (21).

3. A helical gear tubular motor structure according to claim 2, characterized in that: A bottom plate (22) is provided on a side of the gear box (2) away from the motor cylinder (1), and a second shaft hole for facilitating the output shaft (3) to pass through is provided on the bottom plate (22).

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

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 gear box (2) and the bottom plate (22), and the gear box (2) is filled with lubricating oil.

6. The helical gear tubular motor structure according to claim 3, characterized in that: The gear box (2) is connected to the motor barrel (1) via a first connecting bolt (27), and the gear box (2) is connected to the base plate (22) via a 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 number of the second connecting bolt (28) are both at least one, and the gear box (2) is provided with a bolt barrel (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 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.

9. The helical gear tubular motor structure according to claim 3, characterized in that: The motor cylinder (1) and the bottom plate (22) are both 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 gear box (2) is an integrally formed part.

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