Transmission case device

Abstract

The utility model relates to a transmission case device. The transmission case device is used for connecting a driving mechanism and a track device. The transmission box device comprises a transmission box body, a first transmission assembly, a second transmission assembly and a transmission adjusting assembly, wherein the first transmission assembly, the second transmission assembly and the transmission adjusting assembly are installed on the transmission box body, and the transmission adjusting assembly is rotationally connected with the transmission box body and can linearly move in the axis direction. The transmission adjusting assembly is driven by the driving mechanism to move linearly so as to switch one of the first transmission assembly and the second transmission assembly to be in meshed driving connection with the transmission adjusting assembly, and the first transmission assembly is used for controlling the dimming function of curtain cloth on the rail device. The second transmission assembly is used for controlling the opening and closing functions of the curtain cloth on the rail device. The transmission box device is provided with a single transmission adjusting assembly for switching transmission, so that a single transmission structure is achieved, and driving connection is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of light shielding, in particular to an electric curtain, and more particularly to a transmission box device. Background Art

[0002] An electric curtain is provided with a guide rail device and a power device. The power device transfers the driving force through a transmission box device to control the opening and closing function and the light adjustment function of the guide rail device. In the related art, the transmission box device independently transmits the opening and closing power and the light adjustment power. Correspondingly, the power device is set as a dual-motor structure to output the corresponding driving force. For example, an opening and closing motor outputs the opening and closing power, and a light adjustment motor outputs the light adjustment power. The transmission box device is adapted to the dual-power motor structure, and then the transmission box device needs to be provided with two sets of transmission structures to connect the corresponding power motors. For example, the transmission box applied to an electric curtain disclosed in the Chinese patent application publication No. CN116195872A.

[0003] However, the transmission box device needs to be provided with a double docking mechanism corresponding to two dual-power motors, which not only has a complex structure and a large space layout, but also has high assembly accuracy requirements and high machining accuracy requirements for the double docking mechanism, and there is also a technical problem of a large installation space. Therefore, improvement is needed. Summary of the Utility Model

[0004] To overcome the problems existing in the related art, an embodiment of the utility model provides a transmission box device.

[0005] According to the first aspect of the embodiment of the utility model, a transmission box device is provided for connecting a driving mechanism and a track device. The transmission box device includes a transmission box body, a first transmission component, a second transmission component and a transmission adjustment component mounted on the transmission box body. The transmission adjustment component is rotatably connected to the transmission box body and can linearly move along the axial direction.

[0006] The transmission adjustment component linearly moves under the drive of the driving mechanism to switch the meshing and driving connection between one of the first transmission component and the second transmission component and the transmission adjustment component. The first transmission component is used to control the light adjustment function of the curtain on the track device, and the second transmission component is used to control the opening and closing function of the curtain on the track device.

[0007] In one embodiment, the first transmission component includes a first transmission gear and a first gear set. The first transmission gear is provided with a first inner tooth hole penetrating through the center and a first outer tooth set located on the outer peripheral wall. The transmission adjustment component is inserted and matched with the first inner tooth hole, and the first outer tooth set is meshed and connected to the first gear set.

[0008] In one embodiment, the first gear set includes a first intermediate gear and a dimming gear. The first intermediate gear drives and adjusts the transmission ratio between the first external gear set and the dimming gear. The dimming gear is misaligned and connected to the first intermediate gear with respect to the first external gear set.

[0009] In one embodiment, the first intermediate gear includes a large tooth portion and a small tooth portion coaxially arranged. The first external gear set is meshed and connected to the large tooth portion, and the dimming gear is meshed and drivingly connected to the small tooth portion.

[0010] In one embodiment, the second transmission assembly includes a second transmission gear and a second gear set. The second transmission gear is provided with a second internal tooth hole penetrating through the center and a second external gear set located on the outer peripheral wall. The transmission adjustment assembly is inserted and matched with the second internal tooth hole, and the second external gear set is meshed and connected to the second gear set.

[0011] In one embodiment, the second gear set includes a second intermediate gear, a transmission bevel gear, and an output bevel gear. The transmission bevel gear is meshed and connected to the second intermediate gear, and the transmission bevel gear and the output bevel gear are connected by bevel gears.

[0012] In one embodiment, the transmission box device includes a rotating member and a sensing member installed on the transmission box body. The rotating member is installed on the first transmission assembly and / or the second transmission assembly, and the sensing member is used to sense and detect the rotation angle and / or rotation direction of the rotating member.

[0013] In one embodiment, the rotating member includes a magnetic ring composed of alternately distributed magnetic regions, and the magnetic poles of adjacent two magnetic regions are opposite. The sensing member is a Hall element installed on the transmission box body.

[0014] In one embodiment, there are two Hall elements, and the distance between the two Hall elements is greater than the width of the magnetic region.

[0015] In one embodiment, the transmission adjustment assembly includes a push rod assembly, a front gear, a rear gear, a first preloading mechanism, and a second preloading mechanism. The push rod assembly is slidably connected to the transmission box body and connected to the driving mechanism. The front gear and the rear gear are slidably connected to the push rod assembly. The two ends of the first preloading mechanism elastically abut against the push rod assembly and the first transmission assembly respectively. The two ends of the second preloading mechanism elastically abut against the front gear and the rear gear respectively. The push rod assembly is provided with a stop portion for limiting the rear gear.

[0016] The push rod assembly slides and rotates along the transmission box body so that the front gear is meshed and driven with the first transmission assembly; or the rear gear is meshed and driven with the second transmission assembly.

[0017] A second aspect of the present utility model discloses an electric curtain, which includes the transmission box device as described above. The electric curtain further includes a guide rail device and a driving mechanism. The driving mechanism is correspondingly drivingly connected to the first transmission component or the second transmission component through the transmission adjustment component, so that the guide rail device performs an opening and closing function or a light adjustment function.

[0018] The technical solutions provided by the embodiments of the present utility model may include the following beneficial effects: The transmission box device is provided with a single transmission adjustment component for switching transmission, thereby realizing a single transmission structure and simplifying the driving connection. The transmission adjustment component moves to switch the connection to the first transmission component or the second transmission component, thereby realizing the switching function of light adjustment and opening and closing, and the function division has good independence. The overall structural layout of the transmission box device is ingenious and the power transmission is reasonable.

[0019] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present utility model and, together with the specification, are used to explain the principles of the present utility model.

[0021] Figure 1 is a schematic structural diagram showing the transmission box device according to an exemplary embodiment.

[0022] Figure 2 is a schematic structural diagram showing the transmission box device with the cover removed according to an exemplary embodiment.

[0023] Figure 3 is an exploded structural diagram showing the transmission box device according to an exemplary embodiment.

[0024] Figure 4 is a schematic diagram showing the transmission box device with the installation box and the cover hidden according to an exemplary embodiment.

[0025] Figure 5 is a schematic diagram showing the transmission box device connected to the driving mechanism according to an exemplary embodiment.

[0026] Figure 6 is a schematic diagram showing the electric curtain according to an exemplary embodiment.

[0027] In the figure, there is a transmission housing 10; an installation box 11; a transmission shaft 111; an intermediate frame 12; a rotating shaft 121; a cover plate 13; a transmission adjustment assembly 20; a push rod assembly 21; a first preloading mechanism 22; a rear gear 23; a first transmission assembly 30; a first transmission gear 31; a first intermediate gear 32; a large tooth part 321; a small tooth part 322; a dimming gear 33; a second transmission assembly 40; a second transmission gear 41; a second internal tooth hole 411; a second intermediate gear 42; a transmission bevel gear 43; an output bevel gear 44; a rotating member 50; a sensing member 51; a Hall element 511; a magnetic ring 52; a driving mechanism 60; and a track device 70. Detailed implementation manner

[0028] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation of this patent; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] As Figures 1 to 3 shown, the present invention provides a transmission box device for connecting a driving mechanism 60 and a track device 70 to transmit the power of the driving mechanism 60 to the track device 70, thereby driving the track device 70 to open and close and adjust the light.

[0032] The transmission box device includes a transmission box body 10, a first transmission component 30, a second transmission component 40, and a transmission adjustment component 20 installed on the transmission box body 10. The transmission adjustment component 20 is rotatably connected to the transmission box body 10 and can linearly move along the axial direction. The transmission adjustment component 20 is movable between the first transmission component 30 and the second transmission component 40, so that the transmission adjustment component 20 can be drivingly connected to the first transmission component 30 or the second transmission component 40 during the axial sliding process. Moreover, a driving mechanism 60 drives the transmission adjustment component 20 to rotate, thereby realizing the power transmission of the first transmission component 30 or the second transmission component 40.

[0033] The transmission adjustment component 20 linearly moves under the drive of the driving mechanism 60 to switch the meshing driving connection between one of the first transmission component 30 and the second transmission component 40 and the transmission adjustment component 20. The first transmission component 30 and the second transmission component 40 are arranged at intervals and are respectively located inside the transmission box body 10. Among them, the first transmission component 30 is used to control the light adjustment function of the curtain on the track device 70, and the second transmission component 40 is used to control the opening and closing function of the curtain on the track device 70.

[0034] The transmission box device is provided with a single transmission adjustment component 20 for switching the transmission, thereby realizing a single transmission structure and simplifying the driving connection. The transmission adjustment component 20 moves to switch the connection to the first transmission component 30 or the second transmission component 40, thereby realizing the switching function of light adjustment and opening and closing, and the function division has good independence. The overall structural layout of the transmission box device is ingenious and the power transmission is reasonable.

[0035] In an embodiment, the first transmission component 30 includes a first transmission gear 31 and a first gear set. The first transmission gear 31 is provided with a first inner tooth hole penetrating through the center and a first outer tooth set on the outer peripheral wall. The transmission adjustment component 20 is inserted and matched with the first inner tooth hole, and the first outer tooth set is meshingly connected to the first gear set. The first transmission gear 31 is rotatably installed on the transmission box body 10, and the first inner tooth hole penetrates through the first transmission gear 31 in the middle. The first inner tooth hole is set as an internal gear hole or a polygonal hole, and the first inner tooth hole preferably adopts an internal gear hole.

[0036] The transmission adjustment component 20 passes through the first inner tooth hole. The transmission adjustment component 20 includes a push rod component 21, a front gear and a rear gear 23 installed on the push rod component 21. The push rod component 21 slides in the transmission box body 10 under the driving connection of the driving mechanism 60, so that the front gear is meshingly connected to the first transmission gear 31; or the rear gear 23 is meshingly connected to the second transmission gear 41. The push rod component 21 moves and switches under the drive of the driving mechanism 60, thereby realizing the switching use of the light adjustment and opening and closing functions, and the transmission box device adopts a single input, and the input assembly effect is good.

[0037] In one embodiment, the first gear set includes a first intermediate gear 32 and a dimming gear 33. The first intermediate gear 32 drives and adjusts the transmission ratio between the first external gear set and the dimming gear 33. The dimming gear 33 is misaligned and connected to the first intermediate gear 32 with respect to the first external gear set. The first intermediate gear 32 is connected in a transfer manner between the dimming gear 33 and the first external gear set to improve the adjustment of the transmission ratio. The first intermediate gear 32 transfers the first external gear set and the dimming gear 33, and through different meshing positions and transmission parameters, further changes the output speed of the dimming gear 33, which is suitable for the adjustment of a large transmission ratio with a single motor output. Moreover, the first intermediate gear 32 can adjust the transmission space, constituting different transmission position settings and improving the rationality of the spatial layout.

[0038] In one embodiment, the first intermediate gear 32 includes a large tooth portion 321 and a small tooth portion 322 arranged coaxially. The first external gear set is meshed and connected to the large tooth portion 321, and the dimming gear 33 is meshed and drivenly connected to the small tooth portion 322. The large tooth portion 321 and the small tooth portion 322 form a stepped distribution structure, and the outer diameter of the large tooth portion 321 is greater than the outer diameter of the small tooth portion 322. The first intermediate gear 32 is provided with the large tooth portion 321 and the small tooth portion 322 to adjust the axial spatial layout, adapt to the spatial layout structure of the transmission housing 10, and also change the transmission ratio of the first gear set.

[0039] As Figures 3 to 5 shown, the dimming gear 33 is used to connect the dimming component of the track device 70 to constitute the curtain dimming function. Optionally, the dimming gear 33 is provided with a recessed dimming hole, and the dimming hole is provided with a polygonal hole, an elliptical hole or a non-circular special-shaped hole to constitute torque transmission. Preferably, the dimming hole is provided as a triangular hole, a rectangular hole, a hexagonal hole or a spline hole.

[0040] Further, the second transmission component 40 includes a second transmission gear 41 and a second gear set. The second transmission gear 41 is provided with a second internal tooth hole 411 penetrating through the center and a second external gear set located on the outer peripheral wall. The transmission adjustment component 20 is inserted and matched with the second internal tooth hole 411, and the second external gear set is meshed and connected to the second gear set.

[0041] The second internal tooth hole 411 is provided as an internal gear hole or a polygonal hole, and the second internal tooth hole 411 preferably adopts an internal gear hole. The transmission adjustment component 20 passes through the second internal tooth hole 411, and the rear gear 23 and the second internal tooth hole 411 are in a mutually matching structure. Among them, when the rear gear 23 is inserted and meshed with the second internal tooth hole 411 for transmission, the rear gear 23 drives the second transmission component 40 to work, and the front gear is separated from the first transmission component 30. When the rear gear 23 is separated from the second internal tooth hole 411, the front gear is inserted and meshed with the first transmission component 30 for transmission, thereby realizing the switching and use of the dimming and opening / closing functions.

[0042] In an alternative embodiment, the second gear set includes a second intermediate gear 42, a drive bevel gear 43, and an output bevel gear 44. The drive bevel gear 43 is meshed and connected with the second intermediate gear 42, and the drive bevel gear 43 is connected with the output bevel gear 44 through bevel gears to change the power output direction, thereby constituting a vertical or angular output. The center line of the output bevel gear 44 intersects the center line of the drive bevel gear 43 obliquely, preferably, the center line of the output bevel gear 44 intersects the center line of the drive bevel gear 43 perpendicularly.

[0043] The first transmission assembly 30 avoids the output area of the output bevel gear 44 so that the opening and closing belt of the track device 70 can be tensioned and connected with the output bevel gear 44. Specifically, both the output bevel gear 44 and the drive bevel gear 43 include a straight tooth portion and a bevel tooth portion. The straight tooth portion of the drive bevel gear 43 is meshed and connected with the second intermediate gear 42, the bevel tooth portion of the drive bevel gear 43 is meshed and connected with the bevel tooth portion of the drive bevel gear 43, and the straight tooth portion of the drive bevel gear 43 is connected with the opening and closing belt.

[0044] Preferably, the transmission housing 10 includes a mounting box 11, an intermediate frame 12 detachably mounted on the mounting box 11, and a cover plate 13. The intermediate frame 12 is provided with a plurality of rotating shafts 121, and the first transmission gear 31, the first intermediate gear 32, and the dimming gear 33 are respectively mounted on the rotating shafts 121. The mounting box 11 is provided with a plurality of transmission shafts 111, and the second transmission gear 41, the second intermediate gear 42, and the drive bevel gear 43 are respectively mounted on the transmission shafts 111. The cover plate 13 covers the opening of the mounting box 11 and defines the intermediate frame 12.

[0045] To control the rotation dimming angle and the opening and closing position of the curtain on the track device 70, it is necessary to calculate the rotation angle of the first transmission assembly 30 and / or the second transmission assembly 40, and calculate the attitude of the curtain based on the built-in program. Among them, the transmission box device includes a rotating member 50 and a sensing member 51 mounted on the transmission housing 10. The rotating member 50 is mounted on the first transmission assembly 30 and / or the second transmission assembly 40, and the sensing member 51 is used to sense and detect the rotation angle and / or the rotation direction of the rotating member 50. The rotating member 50 rotates as the first transmission assembly 30 or the second transmission assembly 40 rotates. Among them, if the rotating member 50 is mounted on one of the first transmission assembly 30 and the second transmission assembly 40, the sensing member 51 can sense the rotation angle of the rotating member 50 to calculate the dimming or opening and closing position. If the rotating member 50 is respectively mounted on the first transmission assembly 30 and the second transmission assembly 40, the sensing member 51 can sense the rotation angle of the rotating member 50 to calculate the dimming and opening and closing positions.

[0046] Preferably, the rotating member 50 includes a magnetic ring 52. The magnetic ring 52 is mounted on the first transmission assembly 30 and / or the second transmission assembly 40. Specifically, the magnetic ring 52 is mounted on the first transmission gear 31 and / or the second transmission gear 41 to correspondingly detect the transmission stroke of the first transmission assembly 30 and the second transmission assembly 40.

[0047] Among them, the magnetic ring 52 is composed of alternately distributed magnetic regions, and the magnetic poles of two adjacent magnetic regions are opposite. The induction member 51 is a Hall element 511 installed on the transmission box body 10. The magnetic regions are alternately distributed with N poles and S poles, and are sensed by the Hall element 511 during the rotation of the magnetic ring 52. The Hall element 511 outputs a corresponding electrical signal, thereby determining the dimming angle and the opening / closing position.

[0048] Furthermore, two Hall elements 511 are provided, and the distance between the two Hall elements 511 is greater than the width of the magnetic region. The two Hall elements 511 can not only correspondingly detect the rotation angle of the magnetic ring 52, but also detect the rotation direction of the magnetic ring 52, thereby determining the dimming direction and the opening / closing direction, and the detection is convenient.

[0049] As Figures 3 to 5 shown, in order to further improve the assembly position where the front gear and the rear gear 23 are correspondingly and matingly connected to the first transmission assembly 30 and the second transmission assembly 40, the transmission adjustment assembly 20 further includes a first preloading mechanism 22 and a second preloading mechanism. The two ends of the first preloading mechanism 22 elastically push against the push rod assembly 21 and the first transmission assembly 30 respectively, and the two ends of the second preloading mechanism elastically push against the front gear and the rear gear 23 respectively. The push rod assembly 21 is provided with a stop portion that limits the rear gear 23.

[0050] The first preloading mechanism 22 is set as an elastic telescopic structure. The two ends of the first preloading mechanism 22 elastically push against the push rod assembly 21 and the first transmission assembly 30 respectively, so as to have an appropriate elastic pre-tightening force between the push rod assembly 21 and the first transmission assembly 30. The driving mechanism 60 is connected to the push rod assembly 21, and the first preloading mechanism 22 can keep the push rod assembly 21 and the driving mechanism 60 in a tight transmission connection. Optionally, the second preloading mechanism can be set as a spring.

[0051] The two ends of the second preloading mechanism elastically push against the front gear and the rear gear 23 respectively, so that the front gear and the rear gear 23 can slide along the push rod assembly 21 and can also have a reset elastic pre-tightening force. The push rod assembly 21 is provided with a stop portion that limits the rear gear 23, and the rear gear 23 slides along the push rod assembly 21 and is limited by the stop portion. At the same time, when the push rod assembly 21 moves axially, the stop portion can drive the rear gear 23 to move, so that the rear gear 23 moves with the push rod assembly 21. Among them, the push rod assembly 21 is rotatably installed on the transmission box body 10.

[0052] The working process is as follows: when the driving mechanism 60 pushes the push rod assembly 21 to move linearly in the first direction, the push rod assembly 21 pushes the front gear to separate from the first transmission assembly 30, and the rear gear 23 is meshed and drivingly connected to the second transmission assembly 40 under the pressure of the second preloading mechanism. When the driving mechanism 60 pushes the push rod assembly 21 to move linearly in the second direction, the front gear is meshed and drivingly connected to the first transmission assembly 30 under the pressure of the second preloading mechanism, and the rear gear 23 is separated from the second transmission assembly 40 under the drive of the stopping portion. The first direction and the second direction are opposite directions.

[0053] As Figures 5 to 6 shown, the transmission box device disclosed in the above embodiment is applied to an electric curtain. The electric curtain further includes a track device 70 and a driving mechanism 60. The driving mechanism 60 is correspondingly drivingly connected to the first transmission assembly 30 or the second transmission assembly 40 through a transmission adjustment assembly 20, so that the track device 70 performs an opening / closing function or a light adjustment function.

[0054] The driving mechanism 60 is correspondingly drivingly connected to the first transmission assembly 30 or the second transmission assembly 40 through the transmission box device. The driving mechanism 60 is connected to the push rod assembly 21 of the transmission box device by a single output end to achieve linear movement power output and rotational power output. The first transmission assembly 30 or the second transmission assembly 40 realizes the opening / closing adjustment and light adjustment functions of the curtain on the track device 70 through the transmission adjustment assembly 20, and the adjustment effect is good.

[0055] After considering the specification and practicing the disclosure herein, those skilled in the art will readily conceive of other embodiments of the present invention. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0056] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A transmission box device for connecting a driving mechanism (60) and a track device (70), characterized in that: The transmission box device comprises a transmission box body (10), a first transmission assembly (30) mounted on the transmission box body (10), a second transmission assembly (40) and a transmission adjustment assembly (20), wherein the transmission adjustment assembly (20) is rotatably connected to the transmission box body (10) and can move linearly along an axial direction; The transmission adjustment component (20) moves linearly under the drive of the driving mechanism (60) to switch one of the first transmission component (30) and the second transmission component (40) to mesh with the transmission adjustment component (20) for driving connection, the first transmission component (30) being used to control the dimming function of the curtain on the track device (70), and the second transmission component (40) being used to control the opening and closing function of the curtain on the track device (70).

2. The transmission box device according to claim 1, characterized in that: The first transmission assembly (30) comprises a first transmission gear (31) and a first gear set, the first transmission gear (31) being provided with a first internal tooth hole running through the center and a first external tooth set located on the outer peripheral wall, the transmission adjustment assembly (20) being plug-fitted with the first internal tooth hole, and the first external tooth set being meshingly connected to the first gear set.

3. The transmission box device according to claim 2, characterized in that: The first gear set comprises a first intermediate gear (32) and a dimming gear (33); the first intermediate gear (32) is used to adjust the transmission ratio between the first outer gear set and the dimming gear (33); the dimming gear (33) is connected to the first intermediate gear (32) in a staggered manner with the first outer gear set.

4. The transmission box device according to claim 3, characterized in that: The first intermediate gear (32) comprises a large tooth portion (321) and a small tooth portion (322) which are coaxially arranged, the first external tooth group and the large tooth portion (321) are meshingly connected, and the dimming gear (33) and the small tooth portion (322) are meshingly drivingly connected.

5. The transmission box device according to claim 1, characterized in that: The second transmission assembly (40) comprises a second transmission gear (41) and a second gear set. The second transmission gear (41) is provided with a second internal tooth hole (411) passing through the center and a second external tooth set located on the outer peripheral wall. The transmission adjustment assembly (20) and the second internal tooth hole (411) are plug-fitted, and the second external tooth set is meshedly connected to the second gear set.

6. The transmission box device according to claim 5, characterized in that: The second gear set comprises a second intermediate gear (42), transmission bevel gears (43) and output bevel gears (44); the transmission bevel gears (43) and the second intermediate gear (42) are meshingly connected, and the transmission bevel gears (43) and the output bevel gears (44) are connected via bevel gears.

7. The transmission box device according to claim 1, characterized in that: The transmission box device comprises a rotating member (50) and a sensing member (51) mounted on the transmission box body (10); the rotating member (50) is mounted on the first transmission assembly (30) and / or the second transmission assembly (40); and the sensing member (51) is used to sense and detect the rotation angle and / or rotation direction of the rotating member (50).

8. The transmission box device according to claim 7, characterized in that: The rotating member (50) comprises a magnetic ring (52) composed of alternately distributed magnetic regions, wherein the magnetic poles of two adjacent magnetic regions are opposite, and the induction member (51) is a Hall element (511) installed on the transmission housing (10).

9. The transmission box device according to claim 8, characterized in that: Two Hall elements (511) are provided, and the distance between the two Hall elements (511) is greater than the width of the magnetic region.

10. The transmission box device according to claim 1, characterized in that: The transmission adjustment assembly (20) comprises a push rod assembly (21), a front gear, a rear gear (23), a first pre-pressing mechanism (22) and a second pre-pressing mechanism; the push rod assembly (21) is slidably connected to the transmission housing (10) and connected to the driving mechanism (60); the front gear and the rear gear (23) are slidably connected to the push rod assembly (21); two ends of the first pre-pressing mechanism (22) elastically push the push rod assembly (21) and the first transmission assembly (30) respectively; two ends of the second pre-pressing mechanism elastically push the front gear and the rear gear (23) respectively; and the push rod assembly (21) is provided with a stopper for limiting the rear gear (23); The push rod assembly (21) slides and rotates along the transmission housing (10), so that the front gear is meshed and driven with the first transmission assembly (30); or the rear gear (23) is meshed and driven with the second transmission assembly (40).

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