Multi-stage helical gear tubular motor structure

Abstract

The invention provides a multi-stage helical gear tubular motor structure, and relates to the technical field of tubular motors, the multi-stage 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, an output shaft and a speed reduction part are arranged in the gear box, and an output gear is arranged on the output shaft; the speed reducing part comprises a first speed reducing part and a second speed reducing part; the gear box comprises a first gear box and a second gear box; the joint of the first speed reduction part and the motor shaft is located in the first gearbox, and the joint of the second speed reduction part and the output shaft is located in the second gearbox. The motor shaft, the first speed reduction part, the second speed reduction part and the output gear are all of a bevel gear structure. The helical gear structure is directly adopted for speed reduction to replace planetary speed reduction, the multi-stage helical gear speed reduction is adopted, the speed reduction ratio effect is better, the helical gear structure effectively reduces vibration, noise is low, 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 multi-stage 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 multi-stage helical gear tubular motor structure. Summary of the invention

[0008] The purpose of the present invention is to provide a multi-stage helical gear tubular motor structure, which directly adopts a helical gear structure to reduce speed instead of a planetary reduction. Through the multi-stage helical gear reduction, the reduction ratio effect is better, and the helical gear structure effectively reduces vibration, has low noise, and has low energy loss, so that the lifting load is larger. It has a simple structure, low preparation cost, lower maintenance requirements, and a long service life.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-stage helical gear tubular motor structure, comprising a motor barrel and a gear box located in a motor sleeve, wherein the 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, and an output gear is arranged on the output shaft; the reduction member comprises a first reduction member connected to the motor shaft and a second reduction member for connecting the first reduction member and the output gear; the gear box comprises 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 reduction member and the motor shaft is located in the first gear box, and the connection between the second reduction member and the output shaft is located in the second gear box; the motor shaft, the first reduction member, the second reduction member and the output gear are all provided with helical gear stripes.

[0010] As a preferred embodiment of the present invention, the speed reducer also includes an additional speed reducer arranged in the second gear box, the second speed reducer is connected to the output gear through the additional speed reducer, the additional speed reducer is a helical gear, and the number of the additional speed reducer is at least one.

[0011] As a preferred embodiment of the present invention, the first reduction member includes a first functional shaft and a first functional gear coaxially arranged with the first functional shaft; the second reduction member includes a second functional shaft and a second functional gear coaxially arranged with the second functional shaft; the motor shaft is meshedly connected with the first functional gear; the first functional shaft is meshedly connected with the second functional gear; the second functional shaft is meshedly connected with the output gear; and the first functional shaft, the first functional gear, the second functional shaft and the second functional gear are all provided with helical gear stripes.

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

[0013] As a preferred embodiment of the present invention, a first limit bearing is provided at one end of the first functional shaft away from the first functional gear, a second limit bearing is provided at one end of the first functional gear away from the first functional shaft, a third limit bearing is provided on the second functional shaft, and a fourth limit bearing is provided at one end of the second functional gear away from the second functional shaft. A third shaft hole for facilitating the passage of the second functional shaft and a first limit cylinder for facilitating the installation of the first limit bearing are provided on the first bottom plate, a second limit cylinder for facilitating the installation of the second limit bearing and a third limit cylinder for facilitating the installation of the fourth limit bearing are provided on the top plate; a fourth limit cylinder for facilitating the installation of the third limit bearing is provided on the second bottom plate.

[0014] 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.

[0015] 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.

[0016] As a preferred embodiment of the present invention, the number of the first connecting bolt and the second connecting bolt are at least one, and the first gear box is provided with a first bolt cylinder for facilitating the installation of the first connecting bolt; the second gear box is provided with a second bolt cylinder for facilitating the installation of the second connecting bolt.

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

[0018] As a preferred embodiment of the present invention, the first gear box and the second gear box are both integrally formed parts.

[0019] The beneficial effects of the multi-stage helical gear tubular motor structure of the present invention are: the helical gear structure is directly used to replace the planetary reduction, and through the multi-stage helical gear reduction, 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, and the transmission ratio range is large and the applicability is wider, the reduction ratio effect is better, and the helical gear structure effectively reduces vibration and low noise. There is no need for multiple planetary gears to drive a sun gear. Under the same level of reduction and the same 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 lower, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the overall structure of an embodiment of a multi-stage 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 multi-stage helical gear tubular motor structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure (from a slightly upper perspective) of a gear box in one embodiment of a multi-stage helical gear tubular motor structure of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure (from a lower perspective) of a gear box in one embodiment of a multi-stage helical gear tubular motor structure of the present invention; Figure 5 A three-dimensional disassembled structural schematic diagram of a part of an embodiment of a multi-stage helical gear tubular motor structure of the present invention (including an additional speed reducer); In the figure: 1. motor cylinder, 11. motor shaft, 12. motor, 2. gear box, 201. first gear box, 202. second gear box, 21. top plate, 22. first bottom plate, 23. second bottom plate, 24. first shaft hole, 25. first bolt cylinder, 26. second bolt cylinder, 27. first connecting bolt, 28. second connecting bolt, 3. output shaft, 31. output gear, 4. reduction member, 41. first reduction member, 411. first functional shaft, 412. first functional gear, 413. first limit bearing, 414. second limit bearing, 42. second reduction member, 421. second functional shaft, 422. second functional gear, 423. third limit bearing, 424. fourth limit bearing, 43. additional reduction member, 5. motor sleeve. 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 4 The figure is only one of the embodiments of the present invention, a multi-stage helical gear tubular motor structure, a multi-stage 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 speed reducer 4 for connecting the motor shaft 11 and the output shaft 3, the output shaft 3 is provided with an output gear 31; the speed reducer 4 includes a first speed reducer 41 connected to the motor shaft 11 and a speed reducer 41 for connecting the motor shaft 11 and the output shaft 3. A second reduction member 42 is used to connect the first reduction member 41 and the output gear 31; 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 41 and the motor shaft 11 is located in the first gear box 201, and the connection between the second reduction member 42 and the output shaft 3 is located in the second gear box 202; the motor shaft 11, the first reduction member 41, the second reduction member 42 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, and the output shaft 3 is provided with an output gear 31; the reduction member 4 includes a first reduction member 41 connected to the motor shaft 11 and a second reduction member 42 for connecting the first reduction member 41 and the output gear 31; the motor shaft 11, the first reduction member 41, the second reduction member 42 and the output gear 31 are all provided with helical gear stripes.

[0030] 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; that is, the connection between the motor shaft 11 and the first reduction member 41 performs a first-stage helical gear reduction, the connection between the first reduction member 41 and the second reduction member 42 performs a second-stage helical gear reduction, and the connection between the second reduction member 42 and the output gear 31 performs a third-stage helical gear reduction, and multi-stage helical gear reduction is performed, with a wider range of reduction ratios.

[0031] It should be noted that since the gearbox 2 contains multiple speed reducers, in order to ensure good installation and fixing effect of the speed reducers and to achieve better meshing stability of the multi-stage helical gear reduction, the gearbox 2 is also arranged in multiple stages. The gearbox 2 includes a first gearbox 201 and a second gearbox 202 arranged on the side of the first gearbox 201 away from the motor barrel 1; the connection between the first speed reducer 41 and the motor shaft 11 is located in the first gearbox 201, and the connection between the second speed reducer 42 and the output shaft 3 is located in the second gearbox 202.

[0032] Here, the first reduction member 41 includes a first functional shaft 411 and a first functional gear 412 coaxially arranged with the first functional shaft 411; the second reduction member 42 includes a second functional shaft 421 and a second functional gear 422 coaxially arranged with the second functional shaft 421; the motor shaft 11 is meshedly connected with the first functional gear 412; the first functional shaft 411 is meshedly connected with the second functional gear 422; the second functional shaft 421 is meshedly connected with the output gear 31; the first functional shaft 411, the first functional gear 412, the second functional shaft 421 and the second functional gear 422 are all provided with bevel gear stripes.

[0033] The outer diameter of the first functional gear 412 is larger than the outer diameter of the motor shaft 11, and the outer diameter of the second functional gear 422 is larger than the outer diameter of the first functional shaft 411; the outer diameter of the output gear 31 is larger than the outer diameter of the second functional shaft 421; and multi-stage helical gear reduction is performed.

[0034] Since the helical gear multi-stage reduction is fully adopted in the present invention, it is neither a planetary reduction nor a planetary reduction superimposed helical gear structure. 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, which makes the lifting load larger. The structure is simple, the preparation cost is low, the maintenance requirements are also lower, and the service life is long.

[0035] Embodiment 2, still as Figures 1 to 5 The figure shown is only one of the embodiments of the present invention. On the basis of the first embodiment, in a multi-stage helical gear tubular motor structure of the present invention, the speed reducer 4 also includes an additional speed reducer 43 arranged in the second gear box 202, and the second speed reducer 42 is connected to the output gear 31 through the additional speed reducer 43. The additional speed reducer 43 is a helical gear, and the number of the additional speed reducer 43 is at least one.

[0036] The structure of the additional reduction member 43 is the same as that of the second reduction member 42, that is, there is a reduction between the second reduction member 42 and the output gear 31, thus forming a four-stage helical gear reduction.

[0037] If there is at least one additional reduction member 4, at least four stages of helical gear reduction are formed.

[0038] Due to consideration of energy loss, general tubular motor helical gear reduction basically only has four-stage helical gear reduction. However, with the development of material technology, the possibility of five-stage or even more than five-stage helical gear reduction is not ruled out.

[0039] Of course, if there are five or more helical gear reductions, then the number of first gear boxes 201 is at least one. For example, the five-stage and six-stage helical gear reductions use two first gear boxes 201 and one second gear box 202 to form a three-stage gear box structure; the seven-stage and eight-stage helical gear reductions use three first gear boxes 201 and one second gear box 202 to form a four-stage gear box structure.

[0040] 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 a multi-stage helical gear tubular motor structure of the present invention, a top plate 21 is provided on the side of the first gear box 201 close to the motor barrel 1; a first axial hole 24 is provided on the top plate 21 for facilitating the passage of the motor shaft 11; a first bottom plate 22 is provided on the side of the first gear box 201 close to the second gear box 202; a second bottom plate 23 is provided on the side of the second gear box 202 away from the motor barrel 1; a second axial hole is provided on the second bottom plate 23 for facilitating the passage of the output shaft 3.

[0041] A first limit bearing 413 is provided at one end of the first functional shaft 411 away from the first functional gear 412, a second limit bearing 414 is provided at one end of the first functional gear 412 away from the first functional shaft 411, a third limit bearing 423 is provided on the second functional shaft 421, a fourth limit bearing 424 is provided at one end of the second functional gear 422 away from the second functional shaft 421, a third shaft hole 221 for facilitating the passage of the second functional shaft 421 and a first limit cylinder 222 for facilitating the installation of the first limit bearing 413 are provided on the first bottom plate 22, a second limit cylinder 211 for facilitating the installation of the second limit bearing 414 and a third limit cylinder 212 for facilitating the installation of the fourth limit bearing 424 are provided on the top plate 21; a fourth limit cylinder 231 for facilitating the installation of the third limit bearing 423 is provided on the second bottom plate 23.

[0042] A first skeleton oil seal is disposed at the first shaft hole 24 , a second skeleton oil seal is disposed at the second shaft hole, a sealing ring is disposed at the connection between the gear box 2 and the bottom plate 22 , and the gear box 2 is filled with lubricating oil.

[0043] That is to say, the gearbox 2 forms a sealed structure as a whole, but the first gearbox 201 and the second gearbox 202 are not sealed. The transmission parts in the entire gearbox 2 are effectively oil-sealed and continuously and stably lubricated. The maintenance requirements of the entire tubular motor are further reduced, the service life is effectively extended, and the safety and stability are better.

[0044] 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.

[0045] The gearbox 2, which is equivalent to an oil-immersed and oil-sealed type, can continuously lubricate between the motor shaft 11 and the reduction member 4, between the reduction members 4 and the reduction members 4, and between the reduction members 4 and the output shaft 3, and can also continuously lubricate the output shaft 3, the motor shaft 11 and the limit bearing.

[0046] Embodiment 4, still as Figures 1 to 5 The figure shown is only one embodiment of the present invention. Based on any of the above embodiments, in a multi-stage helical gear tubular motor structure of the present invention, the first gear box 201 is connected to the motor barrel 1 through a first connecting bolt 27, and the second gear box 202 is connected to the first gear box 201 through a second connecting bolt 28.

[0047] Of course, the number of the first connecting bolt 27 and the second connecting bolt 28 is at least one, and the first gearbox 201 is provided with a first bolt cylinder 25 for facilitating the installation of the first connecting bolt 27; the second gearbox 202 is provided with a second bolt cylinder 26 for facilitating the installation of the second connecting bolt 28.

[0048] 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.

[0049] 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.

[0050] In the present invention, the motor barrel 1 and the second gear box 202 are both provided with fixing bolts 51 for connecting with the motor sleeve 5 .

[0051] Finally, the first gear box 201 and the second gear box 202 are both integrally formed parts. In fact, the gear box 2 is an integrally formed carbon steel alloy part with high shockproof and bending resistance and good stability.

[0052] The present invention discloses a multi-stage helical gear tubular motor structure, which directly adopts a helical gear structure to reduce speed instead of a planetary reduction gear. The multi-stage helical gear reduction has a better reduction ratio effect, and the helical gear structure effectively reduces vibration, has low noise, and has low energy loss, thereby increasing the lifting load. The structure is simple, the preparation cost is low, the maintenance requirements are also lower, and the service life is long.

[0053] 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 multi-stage 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); an output gear (31) is arranged on the output shaft (3); the speed reducer (4) comprises a first speed reducer (41) connected to the motor shaft (11) and a speed reducer (41) for connecting the first speed reducer (41) 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); a connection between the first speed reducer (41) and the motor shaft (11) is located in the first gear box (201), and a connection between the second speed reducer (42) and the output shaft (3) is located in the second gear box (202); and the motor shaft (11), the first speed reducer (41), the second speed reducer (42) and the output gear (31) are all provided with helical gear stripes.

2. A multi-stage helical gear tubular motor structure according to claim 1, characterized in that: The speed reducer (4) further comprises an additional speed reducer (43) arranged in the second gear box (202); the second speed reducer (42) is connected to the output gear (31) via the additional speed reducer (43); the additional speed reducer (4) is a helical gear, and the number of the additional speed reducer (43) is at least one.

3. The multi-stage helical gear tubular motor structure according to claim 1, characterized in that: The first speed reducer (41) comprises a first functional shaft (411) and a first functional gear (412) coaxially arranged with the first functional shaft (411); the second speed reducer (42) comprises a second functional shaft (421) and a second functional gear (422) coaxially arranged with the second functional shaft (421); the motor shaft (11) is meshingly connected with the first functional gear (412); the first functional shaft (411) is meshingly connected with the second functional gear (422); the second functional shaft (421) is meshingly connected with the output gear (31); and the first functional shaft (411), the first functional gear (412), the second functional shaft (421) and the second functional gear (422) are all provided with helical gear stripes.

4. The multi-stage helical gear tubular motor structure according to claim 1, characterized in that: A top plate (21) is provided on a side of the first gear box (201) close to the motor barrel (1); a first shaft hole (24) is provided on the top plate (21) for facilitating the passage of the motor shaft (11); a first bottom plate (22) is provided on a side of the first gear box (201) close to the second gear box (202); a second bottom plate (23) 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 (23) for facilitating the passage of the output shaft (3).

5. The multi-stage helical gear tubular motor structure according to claim 4, characterized in that: A first limiting bearing (413) is provided at one end of the first functional shaft (411) away from the first functional gear (412), a second limiting bearing (414) is provided at one end of the first functional gear (412) away from the first functional shaft (411), a third limiting bearing (423) is provided on the second functional shaft (421), a fourth limiting bearing (424) is provided on one end of the second functional gear (422) away from the second functional shaft (421), and a useful bearing is provided on the first bottom plate (22). A third axial hole (221) is provided on the top plate (21) for facilitating the passage of the second functional shaft (421) and a first limiting cylinder (222) is provided for facilitating the installation of the first limiting bearing (413); a second limiting cylinder (211) is provided on the top plate (21) for facilitating the installation of the second limiting bearing (414) and a third limiting cylinder (212) is provided for facilitating the installation of the fourth limiting bearing (424); and a fourth limiting cylinder (231) is provided on the second bottom plate (23) for facilitating the installation of the third limiting bearing (423).

6. The multi-stage helical gear tubular motor structure according to claim 5, characterized in that: A first skeleton oil seal is provided at the first shaft hole (24), 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.

7. The multi-stage 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 multi-stage 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 the first gear box (201) is provided with a first bolt barrel (25) for facilitating the installation of the first connecting bolt (27); and the second gear box (202) is provided with a second bolt barrel (26) for facilitating the installation of the second connecting bolt (28).

9. The multi-stage helical gear tubular motor structure according to claim 1, characterized in that: The motor barrel (1) and the second gear box (202) are both provided with fixing bolts for connecting to the motor sleeve (5).

10. The multi-stage helical gear tubular motor structure according to claim 1, characterized in that: The first gear box (201) and the second gear box (202) are both integrally formed parts.

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