Driving structure

Abstract

The utility model provides a driving structure which comprises a motor body and a gearbox assembly, the motor body is provided with a driving shaft, and meshing teeth are arranged on the outer surface of the driving shaft; the gear box assembly comprises a gear box, a first gear assembly and a second gear assembly, wherein the first gear assembly and the second gear assembly are arranged in the gear box. The first gear assembly comprises a supporting shaft and a first gear connected to the supporting shaft, and the second gear assembly comprises an output shaft and a second gear connected to the output shaft; the first gear is meshed with the driving shaft, the first gear is meshed with the second gear, and one end of the output shaft extends out of the gearbox and is used for being connected with a load. The problems that a driving motor arranged on an existing electrically-driven garage door is large in size, and the manufacturing cost is increased are solved.

Description

Technical Field

[0001] The present application relates to the field of drive technology, and in particular to a drive structure. Background Art

[0002] As people's living standards improve, the number of private cars is gradually increasing, and the corresponding requirements for safe storage of vehicles are gradually increasing. Generally, garage doors with electric drive functions are installed in the garage. The mass of the electric drive garage doors commonly used in households is often not large, and they are usually equipped with a drive motor similar to the structure of a car wiper motor. This type of motor uses a worm gear transmission mechanism, in which the worm on the motor shaft cooperates with a worm wheel to transmit power and drive the load to move. In order to avoid wear of the worm wheel, this worm wheel is usually made of plastic material, and the worm wheel is designed with a larger module and tooth thickness, which will result in a larger volume of the worm wheel, thereby increasing the production cost. Utility Model Content

[0003] The embodiment of the present application provides a driving structure, which solves the problem that the driving motor equipped in the existing electric-driven garage door is large in size and increases the manufacturing cost.

[0004] The utility model is implemented as follows: a driving structure includes a motor body and a gear box assembly, the motor body has a driving shaft, and the outer surface of the driving shaft is provided with meshing teeth; the gear box assembly includes a gear box, and a first gear assembly and a second gear assembly arranged in the gear box; the first gear assembly includes a supporting shaft and a first gear connected to the supporting shaft, and the second gear assembly includes an output shaft and a second gear connected to the output shaft; the first gear is meshed with the driving shaft, the first gear is meshed with the second gear, and one end of the output shaft extends out of the gear box and is used to connect a load.

[0005] In one embodiment, the first gear includes a first large gear and a first small gear connected in parallel to each other;

[0006] The first large gear is meshed with the driving shaft, and the first small gear is meshed with the second gear.

[0007] In one embodiment, the first large gear and the first small gear are coaxially arranged, and the first large gear, the first small gear and the second gear are all annular external gears.

[0008] In one embodiment, the first large gear, the first small gear and the support shaft are connected as a whole, and the first large gear, the first small gear and the support shaft have the same rotation speed;

[0009] The second gear and the output shaft are connected as one body, and the second gear and the output shaft have the same rotation speed.

[0010] In one embodiment, the transmission ratio between the drive shaft and the first large gear is greater than the transmission ratio between the first small gear and the second gear.

[0011] In one embodiment, the gear box is provided with a first bearing chamber on both sides along its height direction, and both ends of the support shaft are respectively connected to a first bearing. The first bearing is located in the first bearing chamber and is used to limit the movement of the support shaft in the height direction of the gear box.

[0012] In one embodiment, the gear box is provided with second bearing chambers on both sides along its height direction, and the two ends of the output shaft are respectively connected to second bearings. The second bearings are located in the second bearing chambers and are used to limit the movement of the output shaft in the height direction of the gear box.

[0013] In one of the embodiments, the gear box includes a gear box body and a gear box cover disposed on the gear box body;

[0014] The bottom surface of the gear box body is provided with a first bearing chamber and a second bearing chamber, and the top surface of the gear box cover opposite to the gear box body is provided with a first bearing chamber and a second bearing chamber;

[0015] The two first bearing chambers are opposite to each other, and the two second bearing chambers are opposite to each other.

[0016] In one of the embodiments, a connecting ear is provided on the edge of the surface of the motor body where the driving shaft is disposed, and the connecting ear is connected to the gear box body through a connecting piece.

[0017] In one embodiment, the first large gear is made of plastic material, and the first small gear is made of metal material;

[0018] The second gear is made of plastic material or metal material.

[0019] The beneficial effect of the drive structure provided by the present application is that: compared with the prior art, the present application sets a gearbox assembly between the motor body and the load, and the gearbox assembly includes a first gear assembly and a second gear assembly. The drive shaft of the motor body outputs the driving force to the first gear, and the first gear transmits the driving force to the second gear. The second gear transmits the driving force to the load through the output shaft to complete the driving of the load. The entire driving process has a two-stage transmission structure, which can greatly increase the transmission ratio and increase the rotation speed of the drive shaft, so that the volume of the motor body can be reduced while ensuring that the rotation speed of the output shaft remains unchanged; and the increase in the transmission ratio of the drive structure can also effectively reduce the reverse torque of the drive shaft, and when the load is a garage door, the self-locking performance of the garage door can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of a driving structure provided in an embodiment of the present application;

[0021] Figure 2 is a top view of the driving structure provided in an embodiment of the present application;

[0022] Figure 3 is a relative position distribution diagram of a motor body, a first gear assembly, and a second gear assembly of a driving structure provided in an embodiment of the present application;

[0023] Figure 4 is a structural schematic diagram of a first gear assembly of a driving structure provided in an embodiment of the present application;

[0024] Figure 5 It is a structural schematic diagram of the second gear assembly of the driving structure provided in an embodiment of the present application.

[0025] Reference numerals: 1, motor body; 10, driving shaft; 11, connecting ear;

[0026] 2. gear box; 21. gear box body; 22. gear box cover; 201. first bearing chamber; 202. second bearing chamber;

[0027] 3. First gear assembly; 31. Support shaft; 310. First bearing; 32. First gear; 321. First large gear; 322. First small gear;

[0028] 4. Second gear assembly; 41. Output shaft; 410. Second bearing; 42. Second gear. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0034] The embodiment of the present application provides a driving structure, which solves the problem that the driving motor equipped in the existing electric-driven garage door is large in size and increases the manufacturing cost.

[0035] refer to Figure 1-Figure 5 The driving structure provided in the embodiment of the present application includes a motor body 1 and a gear box assembly, the motor body 1 has a driving shaft 10, and the outer surface of the driving shaft 10 is provided with meshing teeth; the gear box assembly includes a gear box 2, and a first gear assembly 3 and a second gear assembly 4 arranged in the gear box 2; the first gear assembly 3 includes a support shaft 31 and a first gear 32 connected to the support shaft 31, and the second gear assembly 4 includes an output shaft 41 and a second gear 42 connected to the output shaft 41; the first gear 32 is meshed with the driving shaft 10, and the first gear 32 is meshed with the second gear 42, and one end of the output shaft 41 extends out of the gear box 2 and is used to connect a load.

[0036] In the embodiment of the present application, the process of the driving structure driving the load is as follows: the motor body 1 is started, so that the driving shaft 10 rotates, and since the driving shaft 10 is meshed with the first gear 32, it will drive the first gear 32 to rotate, and the first gear 32 is meshed with the second gear 42, so the rotation of the first gear 32 will drive the second gear 42 to rotate, and the second gear 42 is connected to the output shaft 41, so the output shaft 41 will rotate together with the second gear 42, thereby driving the load connected to the output shaft 41. When the load is a garage door, the garage door can be driven to open and close by the driving structure of the present application.

[0037] In the prior art, the drive motor used in the garage door has only one-stage gear transmission system. To avoid gear wear, the gear is usually made of plastic material and the gear is designed to have a larger module and tooth thickness. Therefore, the drive motor used in the prior art garage door is relatively large.

[0038] The driving structure of the present application includes a first gear assembly 3 and a second gear assembly 4, that is, a two-stage gear transmission system, which can increase the transmission ratio and increase the driving force of the motor body 1, that is, increase the rotation speed of the driving shaft 10, so that the rotation speed of the output shaft 41 is the same as the rotation speed of the output shaft 41 of the driving motor in the prior art. On the basis of achieving the same rotation speed as the prior art, the volume of the motor body 1, the first gear assembly 3 and the second gear assembly 4 of the driving structure can be reduced, thereby reducing the overall volume of the driving structure, which is conducive to miniaturization.

[0039] In addition, the load in the embodiment of the present application may be a lifting garage door. After this type of garage door is raised, it is also necessary to avoid falling. The gear transmission of the drive motor itself has a self-locking characteristic. This self-locking characteristic prevents the motor from being driven in the reverse direction by the garage door, thereby preventing the garage door from falling. After the drive motor has been running for a long time, the self-locking characteristic of the gear will weaken, and the risk of the garage door falling will increase. However, the drive structure in the present application adopts a two-stage gear transmission, and the transmission ratio is greatly increased, which can effectively increase the reverse torque, so that the self-locking characteristic of the garage door is effectively improved.

[0040] In some embodiments, reference Figure 1 and Figure 4 The first gear 32 includes a first large gear 321 and a first small gear 322 which are connected in parallel to each other; the first large gear 321 is meshed with the driving shaft 10 , and the first small gear 322 is meshed with the second gear 42 .

[0041] Specifically, the first large gear 321 and the first small gear 322 are connected together, so that the first large gear 321 and the first small gear 322 can rotate at the same time. When the driving shaft 10 drives the first large gear 321 to rotate, the first small gear 322 will also rotate at the same speed as the first large gear 321. The first large gear 321 is meshed with the driving shaft 10, which is equivalent to the first-stage transmission system. The first small gear 322 is meshed with the second gear 42 to drive the second gear 42 to rotate, which is equivalent to the second-stage transmission system. The two-stage transmission system can increase the transmission ratio between the driving shaft 10 and the output shaft 41, which is beneficial to reducing the volume of the motor body 1, the first gear assembly 3 and the second gear assembly 4, thereby reducing the overall volume of the driving structure.

[0042] It should be noted that the specific implementation of the first large gear 321 and the first small gear 322 being connected in parallel to each other can be: bolt holes are opened on the first large gear 321 and the first small gear 322, and the first large gear 321 and the first small gear 322 are connected together by bolts, so that the first large gear 321 and the first small gear 322 are detachable, and the first large gear 321 and the first small gear 322 of different sizes can be replaced, so that the transmission ratio between the drive shaft 10 and the first large gear 321 and the transmission ratio between the first small gear 322 and the second gear 42 can be adjusted, thereby changing the transmission ratio of the transmission system of the drive structure, which is beneficial to reducing the overall volume of the drive structure.

[0043] The specific implementation manner in which the first large gear 321 and the first small gear 322 are connected in parallel to each other can also be: the first large gear 321 and the first small gear 322 are integrally formed, so that the connection between the first large gear 321 and the first small gear 322 can be more firmly connected, thereby ensuring that when the first large gear 321 rotates, the first small gear 322 can also rotate at the same time, and the rotation speeds of the first large gear 321 and the first small gear 322 are equal.

[0044] The first large gear 321 can be made of plastic material, and the first small gear 322 can be made of metal material; if the mass of the load is large, the second gear 42 can be made of metal material, and if the mass of the load is small, the second gear 42 can be made of plastic material. In this way, the production cost can be reduced on the basis of meeting the transmission requirements, and the overall weight of the driving structure can also be reduced.

[0045] In some embodiments, reference Figure 4, the first large gear 321 and the first small gear 322 are coaxially arranged, and the first large gear 321, the first small gear 322 and the second gear 42 are all annular external gears. This not only facilitates the installation of the first large gear 321 and the first small gear 322, but also the first large gear 321, the first small gear 322 and the second gear 42 keep the same shape and type, which can also make the meshing between the drive shaft 10 and the first large gear 321 and the meshing between the first small gear 322 and the second gear 42 more stable and reliable, thereby making the gear transmission between the drive shaft 10 and the first large gear 321 and the gear transmission between the first small gear 322 and the second gear 42 more stable and smooth.

[0046] In some embodiments, reference Figure 4 The first large gear 321, the first small gear 322 and the support shaft 31 are connected as a whole, and the rotation speeds of the first large gear 321, the first small gear 322 and the support shaft 31 are the same; the second gear 42 and the output shaft 41 are connected as a whole, and the rotation speeds of the second gear 42 and the output shaft 41 are the same.

[0047] Through the above arrangement, when the first large gear 321 rotates, the first small gear 322 and the support shaft 31 will rotate together with the first large gear 321 at the same rotation speed. When the second gear 42 rotates, the output shaft 41 will rotate together with the second gear 42 at the same rotation speed. Since the transmission ratio of the first-stage transmission system is obtained by calculating the ratio of the rotation speed of the first large gear 321 and the rotation speed of the drive shaft 10, and the transmission ratio of the second-stage transmission system is obtained by calculating the ratio of the rotation speed of the second gear 42 and the rotation speed of the first small gear 322, keeping the first small gear 322 and the first large gear 321 at the same rotation speed can facilitate the calculation of the transmission ratio of the second-stage transmission system. In order to keep the rotation speed output by the output shaft 41 the same as the rotation speed output by the drive motor in the prior art, the rotation speed of the drive shaft 10 can be increased. When the transmission ratio of the first-stage transmission system and the transmission ratio of the second-stage transmission system are relatively accurate, the rotation speed of the drive shaft 10 can be accurately adjusted, so that when the rotation speed output by the drive structure remains the same as that in the prior art, its volume can be effectively reduced.

[0048] In some embodiments, the transmission ratio between the driving shaft 10 and the first large gear 321 is greater than the transmission ratio between the first small gear 322 and the second gear 42 .

[0049] The transmission ratio is the ratio of the angular velocities of the two rotating components in the mechanism, also known as the speed ratio. The transmission ratio of component a and component b is i=ωa / ωb=na / nb, where ωa and ωb are the angular velocities of components a and b (radians / second), respectively; na and nb are the rotational speeds of components a and b (revs / min), respectively.

[0050] The outer dimensions and mass of the transmission mechanism depend largely on the size of the low-speed gear. A smaller low-speed transmission ratio is beneficial to reducing the outer dimensions and mass. The transmission ratio between the drive shaft 10 and the first gear 321 in the present application is also the high-speed transmission ratio, and the transmission ratio between the first pinion 322 and the second gear 42 is the low-speed transmission ratio. Therefore, setting the transmission ratio between the drive shaft 10 and the first gear 321 to be greater than the transmission ratio between the first pinion 322 and the second gear 42 is beneficial to reducing the volume of the motor body 1, the first gear assembly 3 and the second gear assembly 4, thereby miniaturizing the drive structure.

[0051] For example, the overall transmission process of the driving structure of the present application is specifically as follows: the motor body 1 provides driving force and outputs it through the driving shaft 10, the rotation speed of the driving shaft 10 is n1, the driving shaft 10 is meshed with the first large gear 321, thereby driving the first large gear 321 to rotate, the rotation speed of the first large gear 321 is n2, and at the same time, the first small gear 322 and the support shaft 31 have the same rotation speed n2 as the first large gear 321, the rotation speed n1 of the driving shaft 10 is decelerated by the first large gear 321, and then transmitted to the second gear 42 through the first small gear 322 for further deceleration, the rotation speed of the second gear 42 is n3, and at the same time, the output shaft 41 also has the same rotation speed n3 as the second gear 42, and finally the output shaft 41 outputs the rotation speed n3 to the load.

[0052] Among them, the transmission ratio between the drive shaft 10 and the first large gear 321 is i 1, and the transmission ratio between the first small gear 322 and the second gear 42 is i2. It can be seen that: n2=n1 / i 1, n3=n2 / i2, so n3=n1 / (i 1*i2), that is, the rotation speed of the output shaft 41 of the present application is n1 / (i 1*i2), and since there is only one-stage transmission system in the prior art, the rotation speed of the drive motor output in the prior art is analogous to n1 / i 1 in the present application. By comparison, it can be seen that after the present application adopts a two-stage transmission system, the transmission ratio is greatly increased, but the output rotation speed is reduced. In order to make the output rotation speed consistent with the output rotation speed in the prior art, the driving force provided by the motor body 1 can be increased, so that the rotation speed of the drive shaft 10 is increased. In this way, the overall volume of the drive structure can be reduced while keeping the rotation speed of the load output the same as that of the prior art, which is conducive to the miniaturization of the drive structure.

[0053] In addition, when the load applies a reverse torque T3 on the output shaft 41, the output shaft 41 transmits the torque T3 to the second gear 42, and then the second gear 42 transmits it to the first small gear 322. The reverse torque of the first small gear 322 is T2, and the reverse torque of the first large gear 321 connected to the first small gear 322 is also T2. The first large gear 321 transmits the reverse torque T2 to the drive shaft 10, and the drive shaft 10 obtains the reverse torque T1.

[0054] Among them, T2=T3*η2 / i2, T1=T2*η1 / i 1, therefore, T1=(T3*η1*η2) / (i 1*i2), that is to say, the reverse torque on the drive shaft 10 of the present application is (T3*η1*η2) / (i 1*i2), and since there is only one-stage transmission system in the prior art, the reverse torque of the drive shaft 10 of the drive motor in the prior art is analogized to T3*η1 / i1 in the present application. By comparison, it can be seen that after the present application adopts a two-stage transmission system, the reverse torque on the drive shaft 10 becomes smaller, which can make the drive shaft 10 easier to self-lock, that is, the use of a two-stage transmission system can improve the self-locking characteristics of the drive structure, which is beneficial for the garage door to hover after opening, and effectively prevent the garage door from falling.

[0055] In some embodiments, reference Figure 1 A first bearing chamber 201 is provided on both sides of the gear box 2 along its height direction, and first bearings 310 are respectively connected to both ends of the support shaft 31. The first bearing 310 is located in the first bearing chamber 201 and is used to limit the movement of the support shaft 31 in the height direction of the gear box 2.

[0056] Specifically, a first bearing chamber 201 is provided at the top of the gear box 2, and a first bearing chamber 201 is provided at the bottom of the gear box 2. The first bearings 310 connected to the two ends of the support shaft 31 are placed one by one in the first bearing chamber 201, so that the support shaft 31 can be extended in the height direction of the gear box 2, thereby fixing the relative position of the support shaft 31 in the gear box 2. Since the first large gear 321 and the first small gear 322 are both connected to the support shaft 31, the relative position of the first large gear 321 and the first small gear 322 can also remain fixed, which is conducive to the stable engagement of the first large gear 321 with the meshing teeth on the outer surface of the drive shaft 10.

[0057] It should be noted that the first bearings 310 are connected to both ends of the support shaft 31, and the first bearings 310 are arranged in the first bearing chamber 201, so that the support shaft 31 can be positioned and fixed, and the support shaft 31 can rotate on a plane perpendicular to the height direction of the gear box 2, that is, the first large gear 321, the first small gear 322 and the support shaft 31 rotate together on a plane perpendicular to the height direction of the gear box 2, so as to better transmit the driving force output by the drive shaft 10. Among them, the support shaft 31 is located in the gear box 2, and the two ends of the support shaft 31 do not extend out of the gear box 2, that is, the first gear assembly 3 is hidden in the gear box 2, so that the overall aesthetics of the drive structure can be improved when observed from the outside, and it can also prevent external forces from directly hitting the first gear assembly 3 to cause damage to the first gear assembly 3, which plays a good protective role.

[0058] In some embodiments, reference Figure 1 A second bearing chamber 202 is provided on both sides of the gear box 2 along its height direction, and second bearings 410 are respectively connected to both ends of the output shaft 41. The second bearing 410 is located in the second bearing chamber 202 and is used to limit the movement of the output shaft 41 in the height direction of the gear box 2.

[0059] Specifically, a second bearing chamber 202 is respectively provided at the top and the bottom of the gear box 2, and the second bearings 410 connected to the two ends of the output shaft 41 are placed in the second bearing chamber 202 one by one, so that the output shaft 41 can be extended in the height direction of the gear box 2, thereby fixing the relative position of the output shaft 41 in the gear box 2. Since the second gear 42 is connected to the output shaft 41, the relative position of the second gear 42 can also remain fixed. According to the above description, the relative position of the first pinion 322 is fixed, and keeping the position of the second gear 42 unchanged can also facilitate stable meshing of the first pinion 322 and the second gear 42.

[0060] It should be noted that the second bearings 410 are connected to both ends of the output shaft 41, and the second bearings 410 are arranged in the second bearing chamber 202, so that the output shaft 41 can be positioned and fixed, and the output shaft 41 can rotate on a plane perpendicular to the height direction of the gear box 2, that is, the second gear 42 and the output shaft 41 rotate together on a plane perpendicular to the height direction of the gear box 2, so as to better transmit the driving force output by the first pinion 322. Among them, the output shaft 41 is located in the gear box 2, and one end of the output shaft 41 extends out of the gear box 2 for connecting the load, that is, the second gear 42 is hidden in the gear box 2, which can well prevent the external force from directly hitting the second gear 42 and causing damage, and play a good protective role for the second gear 42.

[0061] When the support shaft 31 and the output shaft 41 are relatively fixed in the gear box 2, it is equivalent to that the relative positions of the first large gear 321, the first small gear 322 and the second gear 42 remain fixed, so that the first large gear 321 is stably engaged with the meshing teeth on the outer surface of the drive shaft 10, and there will be no separation of the two, resulting in loose meshing and affecting the transmission effect. Similarly, the meshing connection between the first small gear 322 and the second gear 42 is also stable and reliable, and there will be no loose meshing of the first small gear 322 and the second gear 42, resulting in separation of the two, affecting the transmission effect.

[0062] For further reference, Figure 1 The gear box 2 includes a gear box body 21 and a gear box cover 22 arranged on the gear box body 21; a first bearing chamber 201 and a second bearing chamber 202 are provided on the bottom surface of the gear box body 21, and a first bearing chamber 201 and a second bearing chamber 202 are provided on the top surface of the gear box cover 22 opposite to the gear box body 21; the two first bearing chambers 201 are opposite to each other, and the two second bearing chambers 202 are opposite to each other.

[0063] Through the above settings, the gear box 2 is set as a split structure, which can make the installation of the first gear assembly 3 and the second gear assembly 4 in the gear box 2 simpler. Specifically, the first bearing 310 connected to one end of the support shaft 31 of the first gear assembly 3 is installed in the first bearing chamber 201 set on the bottom surface of the gear box body 21, and the second bearing 410 connected to one end of the output shaft 41 of the second gear assembly 4 is installed in the second bearing chamber 202 set on the bottom surface of the gear box body 21, and then the gear box cover 22 is set on the gear box body 21, and then the first bearing 310 connected to the other end of the support shaft 31 is installed in the first bearing chamber 201 set on the gear box cover 22, and the second bearing 410 connected to the other end of the output shaft 41 is installed in the second bearing chamber 202 set on the gear box cover 22, to complete the installation of the first gear assembly 3 and the second gear assembly 4 in the gear box 2.

[0064] The gear box cover 22 and the gear box body 21 can be connected by screws, which not only makes the assembly of the gear box 2 faster and more convenient, but also makes the gear box cover 22 easy to disassemble, which is beneficial for users to check the first gear assembly 3 and the second gear assembly 4 installed in the gear box 2.

[0065] It should be noted that the first bearing chamber 201 can be a groove adapted to the first bearing 310, and the second bearing chamber 202 can be a groove adapted to the second bearing 410. The first bearing 310 is connected to the support shaft 31. After the first bearing 310 is placed in the first bearing chamber 201 set on the bottom surface of the gear box body 21, the relative position of the first bearing 310 can be limited to prevent the first bearing 310 from moving on a plane parallel to the bottom surface of the gear box body 21. When the gear box cover 22 is set on the gear box body 21, the other first bearing 310 connected to the support shaft 31 will enter the first bearing chamber 201 set on the gear box cover 22. At this time, the first bearing chamber 201 set on the gear box cover 22 will limit the other first bearing 310, and the support shaft 31 is located between the top surface of the gear box cover 22 and the bottom surface of the gear box body 21, which can also limit the support shaft 31 from moving in the height direction of the gear box 2, so that the relative position of the first gear assembly 3 can be well fixed.

[0066] Similarly, the second bearing 410 is connected to the output shaft 41. After the second bearing 410 is placed in the second bearing chamber 202 set on the bottom surface of the gear box body 21, the relative position of the second bearing 410 can be limited to prevent the second bearing 410 from moving on a plane parallel to the bottom surface of the gear box body 21. When the gear box cover 22 is set on the gear box body 21, the other second bearing 410 connected to the output shaft 41 will enter the second bearing chamber 202 set on the gear box cover 22. At this time, the second bearing chamber 202 set on the gear box cover 22 will limit the other second bearing 410. Although one end of the output shaft 41 extends out of the gear box 2, since the two second bearings 410 connected to the output shaft 41 are located between the top surface of the gear box cover 22 and the bottom surface of the gear box body 21, the output shaft 41 can be well limited to move in the height direction of the gear box 2, thereby better fixing the relative position of the second gear assembly 4.

[0067] In some embodiments, reference Figure 3 A connecting ear 11 is provided on the surface edge of the motor body 1 where the driving shaft 10 is arranged, and the connecting ear 11 is connected to the gear box body 21 through a connecting piece.

[0068] Through the above arrangement, the connection ear 11 of the motor body 1 is connected to the gear box 21 to increase the connection area, so that the motor body 1 is firmly connected to the gear box 21, and the motor body 1 and the gear box 21 can be detachably connected by connecting with a connecting piece, which is conducive to improving the assembly efficiency of the drive structure and reducing the difficulty of disassembly and maintenance when the motor body 1 fails. In addition, connecting the motor body 1 to the gear box 21 can fix the relative position between the drive shaft 10 of the motor body 1 and the gear box 21, which is conducive to the stable and reliable meshing connection between the drive shaft 10 and the first large gear 321, and will not easily separate to affect the transmission effect.

[0069] For example, a mounting hole may be provided on the connecting ear 11 , and a corresponding connecting hole may be provided on the gear box body 21 , and bolts may be passed through the mounting hole and the connecting hole to connect the motor body 1 to the gear box 2 .

[0070] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A driving structure, characterized in that: include: A motor body (1) has a drive shaft (10), and the outer surface of the drive shaft (10) is provided with meshing teeth; A gearbox assembly, comprising a gearbox (2), and a first gear assembly (3) and a second gear assembly (4) arranged in the gearbox (2); the first gear assembly (3) comprises a support shaft (31) and a first gear (32) connected to the support shaft (31), and the second gear assembly (4) comprises an output shaft (41) and a second gear (42) connected to the output shaft (41); The first gear (32) is meshed with the drive shaft (10), the first gear (32) is meshed with the second gear (42), and one end of the output shaft (41) extends out of the gear box (2) and is used to connect a load.

2. The driving structure according to claim 1, characterized in that: The first gear (32) comprises a first large gear (321) and a first small gear (322) which are connected in parallel to each other; The first large gear (321) is meshed with the driving shaft (10), and the first small gear (322) is meshed with the second gear (42).

3. The driving structure according to claim 2, characterized in that: The first large gear (321) and the first small gear (322) are coaxially arranged, and the first large gear (321), the first small gear (322) and the second gear (42) are all annular external gears.

4. The driving structure according to claim 3, characterized in that: The first large gear (321), the first small gear (322) and the support shaft (31) are connected as a whole, and the first large gear (321), the first small gear (322) and the support shaft (31) have the same rotation speed; The second gear (42) and the output shaft (41) are connected as a whole, and the second gear (42) and the output shaft (41) have the same rotation speed.

5. The driving structure according to any one of claims 2 to 4, characterized in that: The transmission ratio between the driving shaft (10) and the first large gear (321) is greater than the transmission ratio between the first small gear (322) and the second gear (42).

6. The driving structure according to any one of claims 1 to 4, characterized in that: The gear box (2) is provided with first bearing chambers (201) on both sides along the height direction thereof, and both ends of the support shaft (31) are respectively connected to first bearings (310), and the first bearings (310) are located in the first bearing chambers (201) and are used to limit the movement of the support shaft (31) in the height direction of the gear box (2).

7. The driving structure according to claim 6, characterized in that: The gear box (2) is provided with second bearing chambers (202) on both sides along the height direction thereof, and the two ends of the output shaft (41) are respectively connected to second bearings (410), and the second bearings (410) are located in the second bearing chambers (202) and are used to limit the movement of the output shaft (41) in the height direction of the gear box (2).

8. The driving structure according to claim 7, characterized in that: The gear box (2) comprises a gear box body (21) and a gear box cover (22) arranged on the gear box body (21); The bottom surface of the gear box body (21) is provided with a first bearing chamber (201) and a second bearing chamber (202); the top surface of the gear box cover (22) opposite to the gear box body (21) is provided with a first bearing chamber (201) and a second bearing chamber (202); The two first bearing chambers (201) are opposite to each other, and the two second bearing chambers (202) are opposite to each other.

9. The driving structure according to claim 8, characterized in that: The motor body (1) is provided with a connecting ear (11) on the edge of the surface on which the drive shaft (10) is arranged, and the connecting ear (11) is connected to the gear box (21) via a connecting piece.

10. The driving structure according to any one of claims 2 to 4, characterized in that: The first large gear (321) is made of plastic material, and the first small gear (322) is made of metal material; The second gear (42) is made of plastic material or metal material.

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