Transmission structure and power device

Abstract

The utility model discloses a transmission structure which comprises a first worm, a face gear, a second worm and a worm wheel, the first worm is meshed with the wheel face on one side of the face gear, torque transmission is conducted between the second worm and the face gear, the second worm is meshed with the worm wheel, and the worm wheel is meshed with the face gear. The first worm, the second worm and the worm gear are all arranged on the same side of the face gear. In the transmission mechanism, two-stage transmission is achieved, worm face gear transmission is adopted in the first-stage transmission, and turbine worm transmission is adopted in the second-stage transmission. Due to the fact that the face gear is adopted, the first worm, the second worm and the turbine can be all arranged on the same side of the face gear, the space is compressed in the axial direction of the face gear, the face gear can be arranged more flatly, and multi-stage transmission can be achieved. In conclusion, the transmission mechanism can effectively solve the problem that an existing transmission mechanism is poor in space compression effect. The utility model discloses a power device comprising the transmission structure.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, and more specifically, to a transmission structure, and also to a power device comprising the transmission structure. Background Art

[0002] The common transmission modes of automobile tail wings, automobile pedals, etc. mostly adopt two-stage worm gear transmission, so that under the condition of the same output torque, the required space thickness occupies a larger size.

[0003] In summary, how to effectively solve the problem of poor spatial compression effect of the current transmission mechanism is an issue that the technicians in this field urgently need to solve. Utility Model Content

[0004] In view of this, the first object of the utility model is to provide a transmission structure, which can effectively solve the problem of poor space compression effect of the current transmission mechanism; the second object of the utility model is to provide a power device including the above-mentioned transmission structure.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] A transmission structure includes a first worm, a face gear, a second worm and a turbine, wherein the first worm is meshed with a wheel surface of one side of the face gear, torque is transmitted between the second worm and the face gear, the second worm is meshed with the turbine, and the first worm, the second worm and the turbine are all arranged on the same side of the face gear.

[0007] In the above transmission mechanism, in a transmission application, power can be input by the first worm, the first worm drives the face gear to rotate, and the second worm follows the face gear to rotate, and then the second worm drives the turbine to rotate, and the turbine can then output power through the output shaft. Of course, in other transmission applications, power can also be input by the turbine. In the above transmission mechanism, two-stage transmission is realized, and the first-stage transmission adopts worm face gear transmission, and the second-stage transmission adopts turbine worm transmission. Because face gears are used, the first worm, the second worm and the turbine can all be arranged on the same side of the face gear to compress the space in the axial direction of the face gear, so as to make it flatter and realize multi-stage transmission. In summary, the transmission mechanism can effectively solve the problem of poor space compression effect of the current transmission mechanism.

[0008] In some technical solutions, the rotation axis of the first worm and the rotation axis of the second worm are staggered and deviated in a direction away from the turbine.

[0009] In some technical solutions, the second worm and the face gear are coaxially arranged; the knurling on the end of the second worm and the knurling on the face gear are matched to enable torque to be transmitted between them.

[0010] In some technical solutions, a housing is further included, and the first worm, the face gear, the second worm and the turbine are all located in the housing.

[0011] In some technical solutions, an output shaft is further included, and the output shaft passes through the turbine along the axial direction and transmits torque therebetween; both ends of the output shaft pass through the housing.

[0012] In some technical solutions, a driving device is further included, and torque is transmitted between the output end of the driving device and the first worm.

[0013] In some technical schemes, the shell includes a first shell portion and a second shell portion, the second shell portion covers the cavity opening of the first shell portion, a first groove matching the face gear is provided at the cavity opening of the first shell portion, the second groove is provided at the bottom of the first groove to match the meshing second worm and the turbine; the third groove matching the first worm is provided at the bottom of the first groove.

[0014] In some technical solutions, the first shell portion has a protruding structure on one side away from the second shell portion, the second groove is correspondingly formed inside the protruding structure, and both sides of the protruding structure have through holes for the output shaft to pass through.

[0015] In some technical solutions, the first shell portion is provided with a connecting flange at the outer end of the third groove, and the connecting flange is connected to the driving device; a rib plate is provided between the connecting flange and the protruding structure.

[0016] In order to achieve the second objective, the utility model further provides a power device, which includes any of the above transmission structures. Since the above transmission structure has the above technical effects, the power device having the transmission structure should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the internal structure of the transmission structure provided by an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the external structure of the transmission structure provided by an embodiment of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the first shell portion provided in an embodiment of the utility model.

[0021] The following are marked in the accompanying drawings:

[0022] A first worm 1, a face gear 2, a second worm 3, a turbine 4, a driving device 5, an output shaft 6, and a housing 7;

[0023] A first groove 71 , a second groove 72 , a third groove 73 , a protruding structure 74 , a connecting flange 75 , a rib plate 76 , and a through hole 77 . DETAILED DESCRIPTION

[0024] The embodiment of the utility model discloses a transmission structure to effectively solve the problem that the space compression effect of the current transmission mechanism is not good.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 3 , Figure 1 A schematic diagram of the internal structure of the transmission structure provided by an embodiment of the utility model; Figure 2 A schematic diagram of the external structure of the transmission structure provided by an embodiment of the utility model; Figure 3 This is a schematic structural diagram of the first shell portion provided in an embodiment of the utility model.

[0027] In some embodiments, a transmission structure is provided, which can be used for parts such as a car rear wing and a car pedal. Specifically, the transmission structure mainly includes a primary transmission assembly and a secondary transmission assembly.

[0028] The primary transmission assembly mainly includes a first worm 1 and a face gear 2, and the wheel surfaces of the first worm 1 and the face gear 2 are meshed so that when one of them rotates around itself, it drives the other to rotate around its own axis. The face gear 2 refers to the gear teeth formed in an annular distribution on one side of the axial direction, and the first worm 1 is attached to this side to mesh with the above-mentioned gear teeth, so that when the first worm 1 rotates, it pushes the gear teeth to move, that is, drives the face gear 2 to rotate, so as to rotate around the above-mentioned annular center. At this time, the annularly distributed gear teeth are equivalent to a rack structure. It should be noted that the specific matching relationship between the worm and the face gear 2 can also refer to the prior art. The rotation axis of the first worm 1 and the rotation axis of the face gear 2 are generally perpendicular to each other. Of course, a certain deviation relative to the vertical state is also possible, subject to the ability to transmit. The rotation axis of the first worm 1 and the rotation axis of the face gear 2 can be staggered or coplanar. It should be noted that the first worm 1 and the face gear 2 can be bidirectional or unidirectional. In a unidirectional transmission, power can be transmitted from the first worm 1 to the face gear 2 but cannot be transmitted from the face gear 2 to the first worm 1 .

[0029] The secondary transmission assembly includes a meshing second worm 3 and a turbine 4 to achieve transmission. The specific transmission between the worm and the turbine 4 can refer to the prior art and will not be described here. The turbine 4 can use a helical gear or a spur gear. Specifically, it can be set accordingly as needed, and generally a helical gear is used. It should be noted that the second worm 3 and the turbine 4 can be bidirectional or unidirectional. In a unidirectional transmission, power can be transmitted from the second worm 3 to the turbine 4, but cannot be transmitted from the turbine 4 to the second worm 3.

[0030] The torque transmission between the second worm 3 and the face gear 2 is such that the transmission of the face gear 2 can drive the second worm 3 to rotate. Of course, the rotation of the second worm 3 can also drive the face gear 2 to rotate. The torque transmission between the second worm 3 and the face gear 2 can be: the two are fixedly connected to rotate coaxially; key connection to ensure torque transmission; or a gear set can be set between the two for transmission, in which case the rotation axis of the second worm 3 and the rotation axis of the face gear 2 are set in parallel. That is, the rotation axis of the second worm 3 and the rotation axis of the face gear 2 are set coaxially or in parallel.

[0031] The first worm 1, the second worm 3 and the turbine 4 are all arranged on the same side of the face gear 2, so as to be staggered on one side of the face gear 2. Since the face gear 2 is disc-shaped, there is enough space on one side to arrange the first worm 1, the second worm 3 and the turbine 4 without being too compact. As shown in the accompanying drawings, in the axial direction of the second worm 3, the first worm 1, the second worm 3 and the turbine 4 are aligned, which can better compress the space in the axial direction of the second worm 3 compared with staggered arrangement in the axial direction of the second worm 3.

[0032] In some embodiments, in the above transmission mechanism, in a transmission application, power can be input by the first worm 1, the first worm 1 drives the face gear 2 to rotate, and the second worm 3 follows the face gear 2 to rotate, and then the second worm 3 drives the turbine 4 to rotate, and the turbine 4 can then output the power through the output shaft 6. Of course, in other transmission applications, power can also be input by the turbine 4. In the above transmission mechanism, two-stage transmission is realized, and the first-stage transmission adopts worm face gear transmission, and the second-stage transmission adopts turbine worm transmission. Because the face gear 2 is adopted, the first worm 1, the second worm 3 and the turbine 4 can all be arranged on the same side of the face gear 2 to compress the space in the axial direction of the face gear 2, so as to make it flatter and realize multi-stage transmission. In summary, the transmission mechanism can effectively solve the problem of poor space compression effect of the current transmission mechanism. The above transmission mechanism is more suitable for compression into a flat structure.

[0033] In some embodiments, it is preferred that the rotation axis of the first worm 1 and the rotation axis of the second worm 3 are staggered and deviated away from the turbine 4, so that they are staggered in all directions perpendicular to the rotation axis of the face gear 2, which can especially reduce the interference between the output shaft 6 and the drive device 5 described later. The distance between the rotation axis of the first worm 1 and the rotation axis of the second worm 3, that is, the deviation distance, can be set as needed to avoid interference. On the basis of avoiding interference, the closer the better, to ensure the transmission between the first worm 1 and the face gear 2. Further, as shown in the accompanying drawings, the rotation axis of the first worm 1 and the rotation axis of the turbine 4 can be set in parallel, and the drive shaft of the drive device 5 can be coaxial with the rotation axis of the first worm 1.

[0034] In some embodiments, the second worm 3 and the face gear 2 can be coaxially arranged, and the two can be fixedly connected, which can be locked by bolts, welded or integrally formed. When the fixed connection is realized, in order to better transmit torque between the second worm 3 and the face gear 2, it is preferred that the knurling at the end of the second worm 3 and the knurling on the face gear 2 are matched to enable torque to be transmitted between each other. For the convenience of installation, the screw can be passed through the shaft hole of the second worm 3 and the shaft hole of the face gear 2 in sequence along the shaft hole of the second worm 3, and then locked by a nut. At this time, the fitting part between the second worm 3 and the face gear 2 is matched by knurling. Knurling is a mechanical process of rolling patterns on the handle or other working surface of metal products, mainly for anti-slip. Of course, the end face of the second worm 3 and the side of the face gear 2 can also be engaged through a tooth structure to transmit torque.

[0035] In some embodiments, in order to better protect the internal structure, a housing 7 is generally provided, in which case the first worm 1, the face gear 2, the second worm 3 and the turbine 4 are all located in the housing 7. Generally speaking, the housing 7 can also be formed by assembling multiple parts for better enclosure and protection.

[0036] In some embodiments, an output shaft 6 is integrated on the transmission structure, and the output shaft 6 can only pass through one end of the turbine 4. Torque transmission is also required between the output shaft 6 and the turbine 4, which can be an integrally formed connection or a plug-in connection, and a key connection or a matching structure is used to realize torque transmission between each other, so that when the turbine 4 rotates, the output shaft 6 is driven to rotate. Generally, the torque transmission between the two is bidirectional, and of course, it can also be unidirectional.

[0037] In some embodiments, the output shaft 6 may be axially passed through the turbine 4 and torque may be transmitted therebetween; specifically, both ends of the output shaft 6 pass through the housing 7, so that both ends of the output shaft 6 are outside the housing 7 and act on their respective target objects. If the shaft hole of the turbine 4 is a flat hole, the output shaft 6 has a flat portion that matches the flat hole, and the output shaft 6 is inserted into the turbine 4 from one end until the flat portion is located in the flat hole.

[0038] In some embodiments, when the transmission structure is further integrated with a drive device 5, torque is transmitted between the output end of the drive device 5 and the first worm 1. The drive device 5 is an engine or an electric motor, generally an electric motor. The main shaft of the electric motor and the first worm 1 are fixedly connected, such as the main shaft is inserted into the shaft hole of the first worm 1, and they are keyed or matched through a square hole column to transmit torque.

[0039] In some embodiments, in order to facilitate the installation of the above structures, the housing 7 preferably includes a first housing portion and a second housing portion, and the second housing portion covers the opening of the first housing portion as a cover. The opening of the first housing portion is provided with a first groove 71 that matches the face gear 2, and the notch of the first groove 71 is the above-mentioned opening. The second housing portion may be provided with a pin shaft inserted into the face gear 2, and the two are rotatably matched.

[0040] The bottom of the first groove 71 is provided with a second groove 72 to match the meshed second worm 3 and turbine 4, and the first shell portion may be provided with a pin hole to match the rotation of the turbine 4, and of course, the rotation axis of the turbine 4 may be limited by limiting the rotation axis of the output shaft 6. The bottom of the first groove 71 is provided with a third groove 73 to match the first worm 1, and the third groove 73 may be provided with a pin hole for limiting the position of the rotation axis of the first worm 1. Of course, the first worm 1 may also be fixedly mounted on the driving shaft of the driving device 5 to limit its own rotation axis through the driving shaft of the driving device 5.

[0041] In some embodiments, a protruding structure 74 may be provided on one side of the first shell away from the second shell, the second groove 72 is correspondingly formed inside the protruding structure 74, and a through hole 77 is provided on both sides of the protruding structure 74 for the output shaft 6 to pass through. Preferably, the through hole 77 and the output shaft 6 are rotationally matched, and the turbine 4 is fixedly mounted on the output shaft 6, so that the turbine 4 does not need to limit the rotation axis by other structures. At this time, a limiting hole for limiting the rotation axis of the second worm 3 may be provided on the top of the protruding structure 74, and the end of the second worm 3 or the fixed part on the second worm 3 is inserted into the above-mentioned limiting hole and rotated to match.

[0042] In some embodiments, the first shell portion may be provided with a connecting flange 75 at the outer end of the third groove 73, the connecting flange 75 is connected to the driving device 5, such as the housing of the motor, and is installed on the connecting flange 75, the two are bolted together, and the connecting flange 75 and the housing are arranged close to each other along the axis direction of the first worm 1. The first shell portion may be provided with a cylindrical hole at the inner end of the third groove 73 to cooperate with the end of the first worm 1 for limiting.

[0043] Furthermore, considering that the first shell is generally a shell-drawing structure with a thin shell, in order to better improve the strength, a rib plate 76 is preferably provided between the connecting flange 75 and the protruding structure 74, and the two ends of the rib plate 76 are respectively connected to the connecting flange 75 and the protruding structure 74, and the side is connected to the corresponding part of the first shell. Of course, the rib plates 76 can be evenly provided in the circumferential direction of the connecting flange 75, and the rib plates 76 can also be evenly provided in the circumferential direction of the protruding structure 74.

[0044] In some embodiments, this embodiment provides a transmission structure, which mainly includes a primary transmission assembly and a secondary transmission assembly, and there is also a transmission relationship between the two. A shell 7 is generally provided to surround the primary transmission assembly and the secondary transmission assembly, which can be fully or partially surrounded to achieve protection. When other structures are also provided, the other structures can also be correspondingly arranged in the shell 7. The shell 7 is generally composed of a plurality of separately arranged shell parts, and the plurality of shell parts are fixedly connected by means of clamping, welding or bolt connection. Specifically, as shown in the attached figure, the shell 7 is divided into an upper shell part and a lower shell part to play the role of installation and protection.

[0045] One end of the transmission structure is the input end. According to the requirements of the input end, a corresponding driving device 5 is set, which can be a rotation driving device or a linear driving device. The rotation driving device is such as an engine, an electric motor, a hydraulic motor, etc., wherein the linear driving device is such as a hydraulic telescopic cylinder, an electric cylinder, etc. Of course, other transmission devices can be set between the input end of the transmission structure and the driving device 5. When the driving device 5 adopts an electric motor, it can be connected to the connection port through a terminal line to provide power.

[0046] The first-stage transmission assembly is a worm face gear transmission assembly, which mainly includes a first worm 1 and a face gear 2, which are meshed with each other. The face gear 2 refers to a side plate surface in the direction of the rotation axis to form an annular gear tooth portion, which is arranged around its own rotation axis, and the first worm 1 is attached to the side plate surface, and the two are meshed. At this time, along the direction of the rotation axis of the face gear 2, the first worm 1 and the face gear 2 are arranged in parallel, so that when the first worm 1 rotates continuously around its own axis, the face gear 2 is pushed to rotate around its own axis. It should be noted that how the face gear 2 and the first worm 1 cooperate in transmission can refer to the prior art. When in use, the first worm 1 can be connected to the above-mentioned drive device 5. If the drive device 5 is an electric motor, the main shaft of the drive device 5 can be directly torque-transmitted with the first worm 1, such as plugged in along the main shaft axis direction and torque transmitted between them, so as to rotate coaxially.

[0047] The axis of the face gear 2 and the axis of the first worm 1 are generally arranged perpendicular to each other, and can be arranged in the same plane or staggered. As shown in the attached figure, it is preferred that the central axis of the face gear 2 and the central axis of the first worm 1 are provided with an eccentricity, and the amount of the eccentricity is determined according to the size of the space, so as to prevent the drive device 5 from interfering with the output shaft 6. When the output shaft 6 is stationary, if the drive device 5 and the face gear 2 are not provided with an eccentricity, the drive device may interfere with the output shaft 6.

[0048] The secondary transmission assembly is a worm-turbine transmission, mainly including a second worm 3 and a turbine 4, wherein the second worm 3 can be coaxially arranged with the face gear 2 to enable transmission between them, such as plug-in connection and key connection for transmission, and of course, the second worm 3 and the face gear 2 can also be fixedly connected, such as welding or integral molding connection. Of course, the axes of the second worm 3 and the face gear 2 can also be arranged in parallel, in which case, they can be driven by gears.

[0049] As shown in the attached figure, one end of the second worm 3 is provided with knurling to cooperate with the face gear 2 through the knurling, mainly to play an anti-rotation role, and along the axial direction of the second worm 3, a clamping device, such as a bolt or other structure, is used to keep the knurling of the second worm 3 and the knurling of the face gear 2 in a matching relationship.

[0050] The second worm 3 and the turbine 4 are meshed so that when the second worm 3 rotates, the turbine 4 can be driven to rotate, wherein the turbine 4 and the first worm 1 are respectively arranged on two sides away from the second worm 3, and the turbine 4, the first worm 1 and the second worm 3 are located on the same side of the face gear 2, and through the above arrangement relationship, a staggered arrangement is achieved to avoid mutual interference, and the space in the axial direction of the face gear 2 is more compact. The turbine 4 can be a spur gear or a helical gear. Specifically, the first worm 1 and the turbine 4 can be arranged side by side, such as the axes of the first worm 1 and the turbine 4 are arranged in parallel or approximately side by side. Of course, the positional relationship between the first worm 1 and the turbine 4 can also be other positional relationships, such as a vertical arrangement, which is not specifically limited here.

[0051] The turbine 4 can be used as an output gear, such as an output shaft 6 connected to the turbine 4, so that when the turbine 4 rotates, the output shaft 6 can be driven to rotate, wherein the torque transmission between the output shaft 6 and the turbine 4 can be achieved by a fixed connection to achieve torque transmission, or by a key connection to achieve torque transmission. The middle of the turbine 4 can be provided with a flat position, which cooperates with the flat position on the output shaft 6, mainly to achieve coaxial rotation. The output shaft 6 can extend from one end of the turbine 4 and then pass through the outside of the housing 7, or extend from both ends of the turbine 4 and then pass through the two ends of the housing 7 to the outside of the housing 7.

[0052] For the convenience of installation, the housing 7 can include a first shell part and a second shell part, wherein the groove cavity of the first shell part is covered and closed by the second shell part. The first shell part is provided with a first groove matching the above-mentioned face gear 2 at the groove cavity mouth, and a second groove is provided at the bottom of the first groove to place the meshing turbine 4 and the second worm 3, and a portion corresponding to the second groove type forms a convex structure 74 on the side of the first shell part away from the second shell part, and the convex structure 74 is drawn inside to form the above-mentioned second groove, and both sides of the convex structure 74 form through holes 77 for the output shaft 6 to pass through, and the convex surface of the convex structure 74 is opened to match the rotating shaft on the second worm 3. Correspondingly, a third groove for placing the above-mentioned first worm 1 is also provided at the bottom of the first groove, wherein the portion corresponding to the third groove type has a plurality of ribs 76 on the side of the first shell part away from the second shell part, and a corresponding connecting flange 75 is provided at one side of the first shell part, and the plurality of ribs 76 are connected between the connecting flange 75 and the convex structure 74. The connecting flange 75 is fixedly connected to the motor housing. The first shell portion and the second shell portion are locked and fixed along the closing direction, that is, the axial direction of the second worm 3, by screws or bolts.

[0053] In the above transmission structure, when in use, the driving device 5 drives the first worm 1 to rotate, and the first worm 1 is meshed with the face gear 2, so that the face gear 2 rotates with it, and the torque is transmitted between the face gear 2 and the second worm 3, so when the face gear 2 rotates, it can drive the second worm 3 to rotate, and the rotation of the second worm 3 can drive the meshing turbine 4 to rotate, and the torque is transmitted between the turbine 4 and the output shaft 6, so the output shaft 6 is driven to rotate. Then the output shaft 6 is driven by the driving device 5 to drive the transmission. Because different transmission ratios are formed between the first worm 1 and the face gear 2, and between the second worm 3 and the turbine 4, the rotation speed can be changed.

[0054] Based on the transmission structure provided in the above embodiments, the utility model further provides a power device, which includes any one of the transmission structures in the above embodiments. Since the power device adopts the transmission structure in the above embodiments, please refer to the above embodiments for the beneficial effects of the power device.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transmission structure, characterized in that: It includes a first worm, a face gear, a second worm and a turbine. The first worm is meshed with a wheel surface of one side of the face gear, torque is transmitted between the second worm and the face gear, the second worm is meshed with the turbine, and the first worm, the second worm and the turbine are all arranged on the same side of the face gear.

2. The transmission structure according to claim 1, characterized in that: The rotation axis of the first worm and the rotation axis of the second worm are staggered and deviate in a direction away from the turbine.

3. The transmission structure according to claim 2, characterized in that: The second worm and the face gear are coaxially arranged; the knurling on the end of the second worm and the knurling on the face gear are matched to each other so that torque can be transmitted between them.

4. The transmission structure according to any one of claims 1 to 3, characterized in that: The invention also includes a housing, wherein the first worm, the face gear, the second worm and the turbine are all located in the housing.

5. The transmission structure according to claim 4, characterized in that: It also includes an output shaft, which passes through the turbine in the axial direction and transmits torque therebetween; both ends of the output shaft pass through the housing.

6. The transmission structure according to claim 5, characterized in that: It also includes a driving device, and torque is transmitted between the output end of the driving device and the first worm.

7. The transmission structure according to claim 6, characterized in that: The shell includes a first shell portion and a second shell portion, the second shell portion covers the cavity opening of the first shell portion, a first groove matching the face gear is provided at the cavity opening of the first shell portion, a second groove is provided at the bottom of the first groove to match the meshing second worm and the turbine; a third groove matching the first worm is provided at the bottom of the first groove.

8. The transmission structure according to claim 7, characterized in that: A side of the first shell portion away from the second shell portion has a protruding structure, the second groove is correspondingly formed inside the protruding structure, and both sides of the protruding structure have through holes for the output shaft to pass through.

9. The transmission structure according to claim 8, characterized in that: The first shell portion is provided with a connecting flange at the outer end of the third groove, and the connecting flange is connected to the driving device; a rib plate is provided between the connecting flange and the protruding structure.

10. A power device, characterized in that: It also includes a transmission structure as described in any one of claims 1-9.

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