Multi-stage helical gear tubular motor structure

Abstract

The utility model provides a multistage helical gear tubular motor structure, which relates to the technical field of tubular motors, and comprises a motor cylinder and a gear box which are positioned in a motor sleeve, a motor shaft of the motor cylinder extends into the gear box, an output shaft and a speed reducing part are arranged in the gear box, 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 instead of 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 utility model relates to tubular motor technical field especially, the utility model relates to a multistage bevel gear tubular motor structure. BACKGROUND

[0002] Motor refers to the electromagnetic device that realizes electric energy conversion or transmission according to electromagnetic induction law, its main function is to produce drive torque, converts electric energy into mechanical energy, as the power source of electric appliance or various machinery, and there are many types of motors, and tubular motor is one of them, tubular motor is widely used in roll shutter door, roll screen window, garage door, sunshade and the like as a small motor, and has good use effect.

[0003] The existing tubular motor usually includes motor and speed reducer, the power output shaft of the motor is connected with the speed reducer, the speed reducer is used to reduce the rotational speed, increase the torque and reduce the load / motor moment of inertia ratio under the premise of ensuring precise transmission, the existing speed reducer usually adopts planetary gear and planetary carrier to realize the speed reduction effect, and such speed reducer is called planetary reducer. The planetary reducer usually includes planetary carrier, planetary gear sleeved on the planetary carrier for planetary motion and inner ring gear meshed with the planetary gear, the power output shaft of the motor is meshed with the nearest planetary gear for transmission, and after the step-by-step speed reduction of the planetary gears of different levels, the last planetary carrier driven by the last planetary gear is used as the external power output, and the output shaft is led out along the rotation axis of the last planetary carrier to form the external output of the planetary reducer, for example, the patent application CN113653770A provides a planetary reduction motor with stable operation, relating to the technical field of motor design, which comprises a gear box, a motor sleeve, a planetary reduction part and a motor shaft, an outer gear ring is arranged outside the planetary reduction part, the gear box is provided with a sleeve and an inner ring gear, the inner ring gear is provided with first meshing teeth on the outer side, the sleeve is provided with second meshing teeth on the inner side, the outer gear ring is provided with third meshing teeth on the inner side, and the gear box is provided with an electronic limiter for connecting with the output shaft of the planetary reduction part. The present application has the advantages of simple structure, separate setting of the inner ring gear and the gear box, separate processing of the inner ring gear, selection of different materials for the inner ring gear and the gear box to increase wear resistance, better connection stability of the outer gear ring, limiting cooperation of the inner ring gear and the last planetary carrier, better planetary reduction stability, higher reduction and stroke position accuracy of the tubular motor and better safety under the condition of guaranteed planetary reduction.

[0004] However, the planetary reduction structure has the following defects: first, vibration: ordinary planetary gear reduction device adopts straight gear, the main disadvantage of straight gear is that there will be vibration in the running process, which is unavoidable; second, transmission ratio limit: due to structural reasons, the minimum single-stage reduction of planetary reducer is 2.8, and the maximum is generally not more than 12.5; third, energy loss: multiple planetary gears are meshed with a sun gear, that is, through multiple pairs of tooth meshing to rotate and transmit, due to the stress being subjected to the meshing action of a single tooth in the cycle, energy is wasted; fourth, high preparation cost: the price of planetary reducer is higher than that of ordinary reducer; fifth, high maintenance requirement: due to the large number of transmission components of planetary reducer, the lubrication and maintenance requirements 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 two defects, some planetary reduction tubular motors now adopt helical gear structure, for example, the utility model patent CN205639560U discloses a tubular motor reduction box, which comprises an inner tooth sleeve, a planetary gear mechanism arranged in the inner tooth sleeve, an inner tooth sleeve cover arranged at the top end of the inner tooth sleeve, a jointer inserted into the inner tooth sleeve cover and an inner tooth sleeve seat arranged at the bottom end of the jointer, wherein the planetary gear mechanism comprises a first-stage planetary gear assembly, a second-stage planetary gear assembly and a third-stage planetary gear assembly; the first-stage planetary gear of the first-stage planetary gear assembly is a helical gear, and the inner side of the inner tooth sleeve has an inner helical gear corresponding to the first-stage planetary gear; a first anti-backlash pad is arranged between the first-stage planetary gear and the inner tooth sleeve, and a second anti-backlash pad is arranged between the second-stage planetary gear and the inner tooth sleeve; a first stainless steel pad is sleeved on the output shaft, the top surface of the first stainless steel pad is attached to the bottom surface of the inner tooth sleeve seat, and a clamping spring is also sleeved on the output shaft, and the top surface of the clamping spring is attached to the bottom surface of the first stainless steel pad. The utility model has the advantages of low noise in use.

[0006] The structure of the above-mentioned utility model partially solves the above-mentioned two defects, but the last three defects still exist, and due to the superposition of planetary reduction and helical gear structure, the vibration reduction is still not enough, 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. Utility model content

[0008] The utility model discloses a multi-stage helical gear tubular motor structure, which directly adopts a helical gear structure to replace planetary reduction, and through multi-stage helical gear reduction, the reduction ratio effect is better, the helical gear structure effectively reduces vibration, noise is low, energy loss is small, load is larger, the structure is simple, preparation cost is low, maintenance requirement is also lower, and service life is long.

[0009] To achieve the above object, the utility model discloses the following technical scheme is realized:

[0010] A multi-stage helical gear tubular motor structure, including the motor cylinder in the motor sleeve and the gear box, the motor shaft of motor cylinder extends to the gear box, the gear box is provided with the output shaft that is coaxial with the motor shaft and the speed reducer for connecting the motor shaft and output shaft, the output gear is provided on the output shaft;The speed reducer includes the first speed reducer connected with the motor shaft and the second speed reducer for connecting the first speed reducer with the output gear;The gear box includes the first gear box and the second gear box that is arranged on the side of the first gear box away from the motor cylinder;The first speed reducer and motor shaft connection are located in the first gear box, and the second speed reducer and the output shaft connection are located in the second gear box;The motor shaft, first speed reducer, second speed reducer and output gear are all provided with helical gear stripes.

[0011] As a preferred embodiment of the utility model, the speed reducer further includes an additional speed reducer arranged in the second gear box, the second speed reducer is connected with the output gear through the additional speed reducer, the additional speed reducer is a helical gear part, and the number of the additional speed reducer is at least one.

[0012] As a preferred embodiment of the utility model, the first speed reducer includes a first function shaft and a first function gear coaxially arranged with the first function shaft;The second speed reducer includes a second function shaft and a second function gear coaxially arranged with the second function shaft;The motor shaft is engaged with the first function gear;The first function shaft is engaged with the second function gear;The second function shaft is engaged with the output gear;The first function shaft, first function gear, second function shaft and second function gear are all provided with helical gear stripes.

[0013] As a preferred embodiment of the utility model, the first gear box is provided with a top plate on the side close to the motor cylinder;The top plate is provided with a first shaft hole for facilitating the motor shaft to pass through;The first gear box is provided with a first bottom plate on the side close to the second gear box;The second gear box is provided with a second bottom plate on the side away from the motor cylinder;The second bottom plate is provided with a second shaft hole for facilitating the output shaft to pass through.

[0014] As the preferred of the utility model, one end of the first function shaft away from the first function gear is provided with a first limit bearing, one end of the first function gear away from the first function shaft is provided with a second limit bearing, the second function shaft is provided with a third limit bearing, one end of the second function gear away from the second function shaft is provided with a fourth limit bearing, the first bottom plate is provided with a third shaft hole for the second function shaft to pass through and a first limit cylinder for the first limit bearing to be installed, and the top plate is provided with a second limit cylinder for the second limit bearing to be installed and a third limit cylinder for the fourth limit bearing to be installed.

[0015] As the preferred of the utility model, the first shaft hole is provided with a first skeleton oil seal, the second shaft hole is provided with a second skeleton oil seal, the gear box and the bottom plate are connected with a sealing ring, and the gear box is filled with lubricating oil.

[0016] As the preferred of the utility model, the first gear box is connected with the motor cylinder through a first connecting bolt, and the second gear box is connected with the first gear box through a second connecting bolt.

[0017] As the preferred of the utility model, the number of the first connecting bolt and the second connecting bolt is at least one, and the first gear box is provided with a first bolt cylinder for the first connecting bolt to be installed.

[0018] As the preferred of the utility model, the motor cylinder and the second gear box are provided with fixing bolts for being connected with a motor sleeve.

[0019] As the preferred of the utility model, the first gear box and the second gear box are integrally formed.

[0020] The utility model discloses a multi-stage helical gear tubular motor structure has the advantages that: directly adopt helical gear structure to replace planetary reduction, and through multi-stage helical gear reduction, the single-stage reduction of helical gear reduction can reach 30 or even above, which is much higher than the planetary reduction of 10, the transmission ratio range is large, the applicability is wider, the reduction ratio effect is better, the helical gear structure effectively reduces the vibration, the noise is low, a sun gear is not needed to be driven by multiple planetary gears, the same stage reduction and the same reduction ratio, the energy loss of the helical gear reduction structure is smaller than that of the planetary reduction structure, the load is larger, the structure is simple, the preparation cost is low, the maintenance requirement is lower, and the service life is long. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1It is an overall structure schematic view of one embodiment of the multi-stage helical gear tubular motor structure of the utility model;

[0022] Fig. 2 It is a three-dimensional exploded structure schematic view of one embodiment of the multi-stage helical gear tubular motor structure of the utility model;

[0023] Fig. 3 It is a three-dimensional structure schematic view of the gear box in one embodiment of the multi-stage helical gear tubular motor structure of the utility model (partial upper view);

[0024] Fig. 4 It is a three-dimensional structure schematic view of the gear box in one embodiment of the multi-stage helical gear tubular motor structure of the utility model (partial lower view);

[0025] Fig. 5 It is a three-dimensional exploded structure schematic view of part of the structure in one embodiment of the multi-stage helical gear tubular motor structure of the utility model (containing additional speed reduction parts);

[0026] In the drawing: 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, speed reduction part, 41, first speed reduction part, 411, first function shaft, 412, first function gear, 413, first limit bearing, 414, second limit bearing, 42, second speed reduction part, 421, second function shaft, 422, second function gear, 423, third limit bearing, 424, fourth limit bearing, 43, additional speed reduction part, 5, motor sleeve. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the utility model, which further describe the technical scheme of the utility model, but the utility model is not limited to these embodiments.

[0028] Various exemplary embodiments of the utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangement and steps of the modules and steps set forth in these embodiments do not limit the scope of the utility model.

[0029] At the same time, it should be understood that, in order to facilitate description, the flow in the drawing does not only proceed separately, but also multiple steps cross each other.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0032] Techniques, methods, and systems known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0033] Example 1: As Figs. 1 to 4 The illustration shown is merely one embodiment of this utility model. A multi-stage helical gear tubular motor structure includes a motor cylinder 1 and a gearbox 2 located within a motor sleeve 5. The motor shaft 11 of the motor cylinder 1 extends into the gearbox 2. The gearbox 2 contains an output shaft 3 coaxially arranged with the motor shaft 11 and a reduction gear 4 for connecting the motor shaft 11 and the output shaft 3. An output gear 31 is mounted on the output shaft 3. The reduction gear 4 includes a first reduction gear 41 connected to the motor shaft 11 and a reduction gear 41 for connecting the first and second stages of the motor shaft 11. The gearbox 2 includes a first gearbox 201 and a second gearbox 202 located on the side of the first gearbox 201 away from the motor cylinder 1; the connection between the first gearbox 41 and the motor shaft 11 is located inside the first gearbox 201, and the connection between the second gearbox 42 and the output shaft 3 is located inside the second gearbox 202; the motor shaft 11, the first gearbox 41, the second gearbox 42, and the output gear 31 are all provided with helical gear stripes.

[0034] In the utility model, the whole tubular motor structure contains motor cylinder 1 of motor 12 and gear box 2 for reducing the output of motor 11 rotation, gear box 2 is connected with motor cylinder 1, and gear box 2 and motor cylinder 1 are all located in motor sleeve 5 of tubular motor, the motor cylinder 1 adopts the conventional motor cylinder 1 structure, and the gear box 2 is improved, and the motor shaft 11 of motor 12 in the motor cylinder 1 extends from the motor cylinder 1 to gear box 2, gear box 2 is provided with output shaft 3 connected with motor shaft 11, output shaft 3 extends from the one end of gear box 2 away from motor cylinder 1, and the roller shutter door is powered and driven.

[0035] Different from the conventional planetary reduction tubular motor, the utility model is completely replaced by helical gear reduction structure instead of planetary reduction structure, and specifically, the gear box 2 is provided with output shaft 3 coaxially arranged with the motor shaft 11 and reduction piece 4 for connecting the motor shaft 11 and output shaft 3, and the output shaft 3 is provided with output gear 31;The reduction piece 4 includes first reduction piece 41 connected with the motor shaft 11 and second reduction piece 42 for connecting the first reduction piece 41 with the output gear 31;The motor shaft 11, first reduction piece 41, second reduction piece 42 and output gear 31 are all provided with helical gear stripes.

[0036] Due to the characteristics of tubular motor, the motor shaft 11 and output shaft 3 need to be coaxially arranged, so that the motor shaft 11 and output shaft 3 can be power transmission and rotation reduction, and a transition reduction piece 4 is needed between the motor shaft 11 and output shaft 3, and the motor shaft 11, output shaft 3 and reduction piece 4 are all helical gear reduction connection;That is, the connection of motor shaft 11 and first reduction piece 41 carries out first-stage helical gear reduction, the connection of first reduction piece 41 and second reduction piece 42 carries out second-stage helical gear reduction, the connection of second reduction piece 42 and output gear 31 carries out third-stage helical gear reduction, and multi-stage helical gear reduction is carried out, and the reduction ratio range is larger.

[0037] It should be noted that, since the gear box 2 contains a plurality of reduction pieces, in order to ensure that the reduction piece installation and fixing effect is good, and in order to make the meshing stability effect of multi-stage helical gear reduction better, the gear box 2 is also provided with multi-stage, and the gear box 2 includes first gear box 201 and second gear box 202 arranged on the side of the first gear box 201 away from the motor cylinder 1;The first reduction piece 41 and motor shaft 11 connection is located in the first gear box 201, and the second reduction piece 42 and output shaft 3 connection is located in the second gear box 202.

[0038] Herein, the first speed reducer 41 comprises a first function shaft 411 and a first function gear 412 coaxially arranged with the first function shaft 411; the second speed reducer 42 comprises a second function shaft 421 and a second function gear 422 coaxially arranged with the second function shaft 421; the motor shaft 11 is in meshing connection with the first function gear 412; the first function shaft 411 is in meshing connection with the second function gear 422; the second function shaft 421 is in meshing connection with the output gear 31; the first function shaft 411, the first function gear 412, the second function shaft 421 and the second function gear 422 are all provided with helical gear stripes.

[0039] The outer diameter of the first function gear 412 is greater than the outer diameter of the motor shaft 11, the outer diameter of the second function gear 422 is greater than the outer diameter of the first function shaft 411; the outer diameter of the output gear 31 is greater than the outer diameter of the second function shaft 421; multi-stage helical gear reduction is carried out.

[0040] In the utility model, the helical gear multi-stage reduction is completely adopted, which is neither planetary reduction nor planetary reduction superimposed helical gear structure, the tubular motor effectively reduces vibration and noise, the transmission ratio range is large, the applicability is wider, the energy loss is small, the load is larger, the structure is simple, the preparation cost is low, the maintenance requirement is lower, and the service life is long.

[0041] Embodiment two, still as Figs. 1 to 5 Shown, only for one embodiment of the utility model, on the basis of embodiment one, the utility model discloses a multi-stage helical gear tubular motor structure, the speed reducer 4 still includes the additional speed reducer 43 arranged in the second gear box 202, the second speed reducer 42 is connected with the output gear 31 through the additional speed reducer 43, the additional speed reducer 43 is a helical gear part, and the number of the additional speed reducer 43 is at least one.

[0042] The structure of the additional speed reducer 43 is same with the structure of the second speed reducer 42, that is to say, there is speed reduction between the second speed reducer 42 and the output gear 31, and four-stage helical gear reduction is formed.

[0043] If the additional speed reducer 43 is at least one, at least four-stage helical gear reduction is formed.

[0044] Due to the consideration of energy loss, generally, the helical gear reduction of the tubular motor is basically four-stage helical gear reduction, but with the development of material technology, five-stage or even more than five-stage helical gear reduction is not excluded.

[0045] Of course, if there is a five-stage or more than five-stage helical gear reduction, then the number of first gearboxes 201 is at least one, for example, five-stage and six-stage helical gear reduction adopts two first gearboxes 201 and one second gearbox 202, forming a three-stage gearbox structure; seven-stage and eight-stage helical gear reduction adopts three first gearboxes 201 and one second gearbox 202, forming a four-stage gearbox structure.

[0046] Embodiment three, still as Figs. 1 to 5 As shown in the figure, only one embodiment of the utility model, on the basis of any of the above embodiments, in the multi-stage helical gear tubular motor structure of the utility model, the first gearbox 201 is provided with a top plate 21 close to one side of the motor cylinder 1; the first gearbox 201 is provided with a first shaft hole 24 for facilitating the motor shaft 11 to pass through on the top plate 21; the first gearbox 201 is provided with a first bottom plate 22 close to one side of the second gearbox 202; the second gearbox 202 is provided with a second bottom plate 23 away from one side of the motor cylinder 1; the second bottom plate 23 is provided with a second shaft hole for facilitating the output shaft 3 to pass through.

[0047] The first function shaft 411 is provided with a first limit bearing 413 away from one end of the first function gear 412, the first function gear 412 is provided with a second limit bearing 414 away from one end of the first function shaft 411, the second function shaft 421 is provided with a third limit bearing 423, the second function gear 422 is provided with a fourth limit bearing 424 away from one end of the second function shaft 421, the first bottom plate 22 is provided with a third shaft hole 221 for facilitating the second function shaft 421 to pass through and a first limit cylinder 222 for facilitating the first limit bearing 413 to be installed, and the top plate 21 is provided with a second limit cylinder 211 for facilitating the second limit bearing 414 to be installed and a third limit cylinder 212 for facilitating the fourth limit bearing 424 to be installed; the second bottom plate 23 is provided with a fourth limit cylinder 231 for facilitating the third limit bearing 423 to be installed.

[0048] The first shaft hole 24 is provided with a first skeleton oil seal, the second shaft hole is provided with a second skeleton oil seal, the gearbox 2 is provided with a sealing ring at the connection with the bottom plate 22, and the gearbox 2 is filled with lubricating oil.

[0049] That is to say, the gearbox 2 as a whole forms a sealed structure, but the first gearbox 201 and the second gearbox 202 are not sealed, the transmission part in the whole gearbox 2 is effectively sealed and continuously and stably lubricated, the maintenance requirement of the whole tubular motor is further reduced, the service life is effectively prolonged, and the safety and stability are better.

[0050] Since both output shaft 3 and motor shaft 11 are rotating parts, the skeleton oil seal, which seals the output shaft 3 and motor shaft 11, is a representative seal that is widely used in rotating shaft parts. The skeleton oil seal is a type of seal and one of the commonly used sealing ring series. It is mainly used for sealing the oil in mechanical components. The skeleton oil seal is a component used to prevent oil from leaking from the gaps in the machine. The skeleton oil seal consists of three parts: the oil seal rubber elastomer, the reinforcing skeleton, and the self-tightening spring. The rubber elastomer consists of the bottom, waist, cutting edge, and sealing lip. Usually, the actual inner diameter of the skeleton oil seal is smaller than the shaft diameter, with a certain "interference fit" to enable the skeleton oil seal to have sealing performance.

[0051] The gearbox 2, which is equivalent to an oil-immersed and oil-sealed type, can continuously lubricate the motor shaft 11 and the reducer 4, the reducer 4 and the reducer 4 and the output shaft 3, and also continuously lubricate the output shaft 3, the motor shaft 11 and the limit bearing.

[0052] Example 4, still as Figs. 1 to 5 As shown, this is only one embodiment of the present utility model. Based on any of the above embodiments, in the multi-stage helical gear tubular motor structure of the present utility model, the first gearbox 201 is connected to the motor cylinder 1 by the first connecting bolt 27, and the second gearbox 202 is connected to the first gearbox 201 by the second connecting bolt 28.

[0053] Of course, there is at least one of each of the first connecting bolt 27 and the second connecting bolt 28, and the first gearbox 201 is provided with a first bolt sleeve 25 for facilitating the installation of the first connecting bolt 27; the second gearbox 202 is provided with a second bolt sleeve 26 for facilitating the installation of the second connecting bolt 28.

[0054] It should be noted that sealing washers are provided at both the first connecting bolt 27 and the second connecting bolt 28 to further ensure the oil sealing effect of the gearbox 2.

[0055] Furthermore, a functional gear is provided on the outer side of the end of the motor shaft 11 away from the output shaft 3. The functional gear is meshed with an absolute encoder, which limits the travel of the motor shaft 11, thus limiting the upper and lower movement of the roller shutter door.

[0056] In this utility model, both the motor cylinder 1 and the second gearbox 202 are provided with fixing bolts 51 for connecting with the motor sleeve 5.

[0057] Finally, both the first gearbox 201 and the second gearbox 202 are integrally formed parts. In fact, gearbox 2 is an integrally formed carbon steel alloy part with high shock resistance and bending resistance, and good stability.

[0058] This utility model discloses a multi-stage helical gear tubular motor structure, which directly uses a helical gear structure to reduce speed instead of a planetary gear. The multi-stage helical gear reduction results in a better reduction ratio, and the helical gear structure effectively reduces vibration, noise, and energy loss, allowing for a larger load capacity. The structure is simple, the manufacturing cost is low, the maintenance requirements are lower, and the service life is long.

[0059] This utility model is not limited to the specific embodiments described above, and various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage helical gear tubular motor structure, characterized in that: The system includes a motor cylinder (1) and a gearbox (2) located within a motor sleeve (5). The motor shaft (11) of the motor cylinder (1) extends into the gearbox (2). The gearbox (2) contains an output shaft (3) coaxially arranged with the motor shaft (11) and a speed reducer (4) for connecting the motor shaft (11) and the output shaft (3). An output gear (31) is provided on the output shaft (3). The speed reducer (4) includes a first speed reducer (41) connected to the motor shaft (11) and a speed reducer for connecting the first speed reducer (41) and the output gear (31). The second reduction component (42); the gearbox (2) includes a first gearbox (201) and a second gearbox (202) disposed on the side of the first gearbox (201) away from the motor cylinder (1); the connection between the first reduction component (41) and the motor shaft (11) is located inside the first gearbox (201), and the connection between the second reduction component (42) and the output shaft (3) is located inside the second gearbox (202); the motor shaft (11), the first reduction component (41), the second reduction component (42) and the output gear (31) are all provided with helical gear stripes.

2. The multi-stage helical gear tubular motor structure according to claim 1, characterized in that: The speed reducer (4) further includes an additional speed reducer (43) disposed in the second gearbox (202). 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.

3. The multi-stage helical gear tubular motor structure according to claim 1, characterized in that: The first reduction component (41) includes a first functional shaft (411) and a first functional gear (412) coaxially arranged with the first functional shaft (411); the second reduction component (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 meshed with the first functional gear (412); the first functional shaft (411) is meshed with the second functional gear (422); the second functional shaft (421) is meshed 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 helical gear stripes.

4. The multi-stage helical gear tubular motor structure according to claim 3, characterized in that: The first gearbox (201) has a top plate (21) on the side near the motor cylinder (1); the top plate (21) has a first shaft hole (24) for the motor shaft (11) to pass through; the first gearbox (201) has a first bottom plate (22) on the side near the second gearbox (202); the second gearbox (202) has a second bottom plate (23) on the side away from the motor cylinder (1); the second bottom plate (23) has a second shaft hole for the output shaft (3) to pass through.

5. The multi-stage helical gear tubular motor structure according to claim 4, characterized in that: A first limiting bearing (413) is provided at the end of the first functional shaft (411) away from the first functional gear (412), a second limiting bearing (414) is provided at the 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), and a fourth limiting bearing (424) is provided at the end of the second functional gear (422) away from the second functional shaft (421). A useful... The top plate (21) is provided with a third shaft hole (221) for facilitating the passage of the second functional shaft (421) and a first limiting cylinder (222) for facilitating the installation of the first limiting bearing (413). The second bottom plate (23) is provided with a fourth limiting cylinder (231) 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 gearbox (2) and the base plate (22), and the gearbox (2) is filled with lubricating oil.

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

8. The multi-stage helical gear tubular motor structure according to claim 7, characterized in that: The number of the first connecting bolt (27) and the second connecting bolt (28) is at least one, and the first gearbox (201) is provided with a first bolt sleeve (25) for facilitating the installation of the first connecting bolt (27); the second gearbox (202) is provided with a second bolt sleeve (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: Both the motor cylinder (1) and the second gearbox (202) are 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 gearbox (201) and the second gearbox (202) are both integrally molded parts.

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