Transmission device, automobile spoiler and automobile

Abstract

The utility model provides a transmission device, an automobile spoiler and an automobile. The transmission device comprises a planetary reduction mechanism, a worm and worm gear transmission mechanism and a bevel gear transmission mechanism, the planetary reduction mechanism is provided with a first connecting shaft, the worm and worm gear transmission mechanism is connected to the first connecting shaft, the worm and worm gear transmission mechanism is provided with a second connecting shaft, and the bevel gear transmission mechanism is connected to the second connecting shaft. The bevel gear transmission mechanism is provided with a third connecting shaft, the second connecting shaft rotates by 90 degrees relative to the first connecting shaft, the third connecting shaft rotates by 90 degrees relative to the second connecting shaft, and the first connecting shaft is parallel to the third connecting shaft. The automobile spoiler comprises a transmission device, a driving mechanism and a spoiler body. The automobile comprises a trunk cover and an automobile spoiler. The planetary reduction mechanism adopts the planetary gear for speed reduction, and the transmission ratio of other components can be reduced when the total transmission ratio is not changed, so that the overall size of the transmission device is reduced, the production cost is saved, and the internal space, occupied by the transmission device, of an automobile can be reduced.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a transmission device, an automobile rear wing and an automobile. Background Art

[0002] With the development of science and technology, electric car spoilers are gradually being used on cars. The electric car spoiler is connected to the car spoiler by a motor through a transmission device, and the motor drives the car to open or close through the transmission device. For safety reasons, the electric car spoiler needs to be opened or closed at a slower speed. The existing transmission device of the car spoiler is realized by three-stage reduction, but the third stage of the three-stage reduction has a relatively large reduction, resulting in a larger overall size of the transmission device. The larger size of the transmission device increases the production cost on the one hand, and occupies more space inside the car on the other hand. Utility Model Content

[0003] The embodiments of the present application provide a transmission device, a car rear wing and a car, which can solve at least part of the above-mentioned technical problems.

[0004] In a first aspect, the present application provides a transmission device, comprising:

[0005] A planetary reduction mechanism, wherein the planetary reduction mechanism is provided with a first connecting shaft;

[0006] A worm gear transmission mechanism, wherein the worm gear transmission mechanism is connected to the first connecting shaft, and the worm gear transmission mechanism is provided with a second connecting shaft;

[0007] A bevel gear transmission mechanism, the bevel gear transmission mechanism is connected to the second connecting shaft, and the bevel gear transmission mechanism is provided with a third connecting shaft;

[0008] The second connecting axis is rotated 90 degrees relative to the first connecting axis, the third connecting axis is rotated 90 degrees relative to the second connecting axis, and the first connecting axis is parallel to the third connecting axis.

[0009] In a second aspect, the present application provides a car rear wing, comprising:

[0010] Transmission device;

[0011] A driving mechanism, the driving mechanism is connected to the transmission device, and the driving mechanism is used to drive the transmission device to work;

[0012] A tail body is connected to the transmission device.

[0013] In a third aspect, the present application provides a car, comprising:

[0014] Trunk lid;

[0015] A car rear wing, the car rear wing is installed on the trunk cover, and the car rear wing rises and falls relative to the trunk cover.

[0016] The present application provides a transmission device, a car tail wing and a car. The transmission device comprises a planetary reduction mechanism, a worm gear transmission mechanism and a bevel gear transmission mechanism, wherein the planetary reduction mechanism is provided with a first connecting shaft, the worm gear transmission mechanism is connected to the first connecting shaft, the worm gear transmission mechanism is provided with a second connecting shaft, the bevel gear transmission mechanism is connected to the second connecting shaft, and the bevel gear transmission mechanism is provided with a third connecting shaft, wherein the second connecting shaft rotates 90 degrees relative to the first connecting shaft, the third connecting shaft rotates 90 degrees relative to the second connecting shaft, and the first connecting shaft is parallel to the third connecting shaft. The car tail wing comprises a transmission device, a driving mechanism and a tail wing body. The car comprises a trunk lid and a car tail wing, and the car tail wing is mounted on the trunk lid. The planetary reduction mechanism of the present application adopts a planetary gear for speed reduction, and the transmission ratio of the remaining components can be reduced when the total transmission ratio remains unchanged, so as to reduce the overall size of the transmission device, save production costs, and reduce the internal space of the car occupied by the transmission device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is an overall schematic diagram of the automobile rear wing in an embodiment of the present application.

[0019] Figure 2 It is a partial three-dimensional schematic diagram of the transmission device in the embodiment of the present application.

[0020] Figure 3 It is a three-dimensional schematic diagram of the internal components of the transmission device in the embodiment of the present application.

[0021] Figure 4 It is a three-dimensional schematic diagram of some components of the transmission device in an embodiment of the present application.

[0022] Figure 5 for Figure 4 A three-dimensional schematic diagram of some components of the transmission device in another direction.

[0023] Figure 6 It is a three-dimensional schematic diagram of the planetary reduction mechanism in the embodiment of the present application.

[0024] Figure 7 for Figure 5 Cross-sectional view of the planetary reduction mechanism at AA.

[0025] Figure 8 It is a three-dimensional schematic diagram of the internal structure of the second box body in the embodiment of the present application.

[0026] Figure Number:

[0027] Transmission - 100;

[0028] Planetary reduction mechanism-1; planetary gear-11; inner gear ring-12; first connecting shaft-13; first housing-14; first accommodating chamber-141; housing-142; end cover-143; connecting shaft positioning member-15; mounting seat-16; insertion hole-161; first stopper-17; planetary carrier-18; round shaft-181; stand-182;

[0029] Worm and worm gear transmission mechanism-2; worm-21; worm gear-22; second connecting shaft-23;

[0030] Bevel gear transmission mechanism-3; first bevel gear-31; second bevel gear-32; third connecting shaft-33;

[0031] Cylindrical gear transmission mechanism-4; first cylindrical gear-41; second cylindrical gear-42; fourth connecting shaft-43; cover plate-44; second stopper-45; cover plate screw-46;

[0032] Second box body-5; second accommodating cavity-51; first protrusion-52; first groove-521; second groove-53; third groove-54; fourth groove-55; second protrusion-56; mounting hole-561; third protrusion-57; connecting hole-571; first box shell-58; second box shell-59; first connecting shaft hole-60; first connecting shaft groove-61;

[0033] Bearing-7; retaining ring-8; screw-9;

[0034] Tail body - 200;

[0035] Driving mechanism - 300;

[0036] Car rear wing -400. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] In the description of the embodiments of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings. The term "connection" in this application, unless otherwise specified, mainly refers to a physical structural connection, and may also include meanings such as direct connection or indirect connection when specified. The terms "first" and "second" in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the term "includes" and any variations thereof are intended to cover non-exclusive inclusions.

[0039] See also Figure 1 , Figure 1 The overall schematic diagram of the automobile rear wing 400 in the embodiment of the present application is shown in FIG. The automobile comprises a trunk lid and an automobile rear wing 400, wherein the automobile rear wing 400 is mounted on the trunk lid, and the automobile rear wing 400 is lifted relative to the trunk lid.

[0040] Therefore, when the car rear wing 400 is opened, the car rear wing 400 can reduce the air resistance of the car, effectively reduce and overcome the influence of air resistance on the car during high-speed driving, thereby increasing the high-speed driving stability of the car; and, since the car rear wing 400 can reduce the air resistance of the car, installing the car rear wing 400 on the car can save fuel; at the same time, it can also play a decorative role.

[0041] In some embodiments, the automobile rear wing 400 includes a transmission device 100 , a driving mechanism 300 and a rear wing body 200 , wherein the driving mechanism 300 is connected to the transmission device 100 , the driving mechanism 300 is used to drive the transmission device 100 to work, and the rear wing body 200 is connected to the transmission device 100 .

[0042] Among them, the driving mechanism 300 and the transmission device 100 are installed in the internal gap of the trunk lid and are connected to each other, the rear wing body 200 is connected to the transmission device 100 and installed on the trunk lid, and the transmission device 100 can reduce the rotation speed output by the driving mechanism 300 to the speed required for the lifting and lowering of the rear wing body 200, so as to drive the rear wing body 200 to lift and lower relative to the trunk lid at a relatively slow speed and thereby open or close the car rear wing 400.

[0043] Therefore, the rear wing 400 can be raised or lowered relative to the rear cover at a relatively slow speed under the drive of the drive mechanism 300 and the transmission of the transmission device 100 to open or close the rear wing 400, thereby preventing the rear wing 400 from being damaged due to high-speed opening or closing during high-speed driving of the car.

[0044] In some embodiments, the driving mechanism 300 includes a driving member and a driving shaft, wherein the driving shaft is connected to the driving member, and the driving member drives the driving shaft to rotate.

[0045] It is understandable that the driving member may be, but is not limited to, a motor, and may be selected according to actual needs and is not limited here.

[0046] Please also read Figure 2-Figure 6 , Figure 2 is a partial three-dimensional schematic diagram of the transmission device 100 in the embodiment of the present application, Figure 3 is a three-dimensional schematic diagram of the internal components of the transmission device 100 in the embodiment of the present application, Figure 4 is a three-dimensional schematic diagram of some components of the transmission device 100 in the embodiment of the present application, Figure 5 for Figure 4 A three-dimensional schematic diagram of a part of the transmission device 100 in another direction, Figure 6 1 is a three-dimensional schematic diagram of a planetary reduction mechanism 1 in an embodiment of the present application. The transmission device 100 includes a planetary reduction mechanism 1, a worm gear transmission mechanism 2, and a bevel gear transmission mechanism 3, wherein the planetary reduction mechanism 1 is provided with a first connecting shaft 13, the worm gear transmission mechanism is connected to the first connecting shaft 13, the worm gear transmission mechanism 2 is provided with a second connecting shaft 23, the bevel gear transmission mechanism 3 is connected to the second connecting shaft 23, and the bevel gear transmission mechanism 3 is provided with a third connecting shaft 33, wherein the second connecting shaft 23 rotates 90 degrees relative to the first connecting shaft 13, the third connecting shaft 33 rotates 90 degrees relative to the second connecting shaft 23, and the first connecting shaft 13 is parallel to the third connecting shaft 33.

[0047] Therefore, the planetary reduction mechanism 1 uses planetary gears for reduction. Since the planetary gears have a larger transmission ratio, the transmission ratios of the remaining components can be reduced while the total transmission ratio remains unchanged, so as to reduce the overall size of the transmission device 100, save production costs, and also reduce the interior space of the car occupied by the transmission device 100.

[0048] In some embodiments, the transmission ratio of the planetary reduction mechanism 1 is 4.8, the transmission ratio of the worm gear transmission mechanism 2 is 30, and the transmission ratio of the bevel gear transmission mechanism 3 is 2. The transmission ratios of the planetary reduction mechanism 1 and the worm gear transmission mechanism 2 are both greater than the transmission ratio of the bevel gear transmission mechanism 3.

[0049] It can be understood that the transmission ratio of the planetary reduction mechanism 1 and the worm gear transmission mechanism 2 can be set as required, which is not limited here.

[0050] The planetary reduction mechanism 1, the worm gear transmission mechanism 2 and the bevel gear transmission mechanism 3 can be spatially arranged according to the required transmission ratio and actual conditions to reduce the overall size of the transmission device 100 and save production costs.

[0051] In some embodiments, the planetary reduction mechanism 1 includes planetary gears, a first connecting shaft 13 and a first housing 14. The first housing 14 is provided with a first accommodating cavity 141, the first accommodating cavity 141 is used to accommodate the planetary gears, and the first connecting shaft 13 passes through one side of the first housing 14 to connect the planetary gears.

[0052] Therefore, the first housing 14 can protect the planetary gears and extend the working life of the planetary gears.

[0053] In some embodiments, the planetary reduction mechanism 1 further includes a connecting shaft positioning member 15 , and the connecting shaft positioning member 15 is installed on the first connecting shaft 13 to position the first connecting shaft 13 in the first housing 14 .

[0054] Therefore, the connecting shaft positioning member 15 can position the first connecting shaft 13 axially in the first housing 14 , thereby preventing the first connecting shaft 13 from being misplaced and improving the stability of the planetary reduction mechanism 1 .

[0055] It is understandable that the connecting shaft positioning member 15 can be, but is not limited to, a locking nut, and can be selected according to actual needs and is not limited here.

[0056] In some embodiments, the first housing 14 includes a shell 142 and an end cover 143 , the end cover 143 is installed and connected to the shell 142 , the first connecting shaft 13 passes through the end cover 143 to connect to the planetary gear, and is axially positioned on the end cover 143 through the connecting shaft positioning member 15 .

[0057] In some embodiments, the planetary gear includes a planetary gear 11, a sun gear (not shown in the figure), an inner ring gear 12 and a planetary carrier 18, the inner ring gear 12 is installed on the inner wall of the first housing 14, the planetary gear 11 is meshed between the sun gear and the inner ring gear 12, the planetary carrier 18 includes a circular shaft 181 and a platform 182, the end of the planetary gear 11 close to the sun gear is connected to the platform 182, the end of the planetary gear 11 away from the sun gear is connected to the circular shaft 181, and the circular shaft 181 is connected to the first connecting shaft 13.

[0058] Thus, the sun gear is connected to the drive shaft to rotate under the drive of the drive shaft, and the planetary gear 11 is rotated by gear meshing. The other side of the planetary gear 11 is meshed with the inner ring gear 12 on the inner wall of the first housing 14. Under the action of the self-rotation driving force, the planetary gear 11 will roll on the inner ring gear 12 to form an orbital motion around the sun gear, and the rotation of the planetary gear 11 can drive the circular shaft 181 and the stand 182 to rotate. Since the circular shaft 181 is connected to the first connecting shaft 13, the circular shaft 181 can drive the first connecting shaft 13 to rotate accordingly, so as to realize planetary gear transmission and achieve a higher transmission ratio. It is also beneficial to reduce the noise and vibration generated during the transmission process, and improve the transmission stability of the planetary reduction mechanism 1 and even the transmission device 100.

[0059] In some embodiments, the planetary gear 11 and the sun gear are designed as helical teeth, which can effectively suppress the sliding friction and impact force on the tooth surface when the helical teeth are engaged, and can reduce the noise generated when the gears are driven.

[0060] Please also read Figure 7 and Figure 8 , Figure 7 for Figure 5 The cross-sectional view of the planetary reduction mechanism 1 at AA, Figure 8 In some embodiments, the first housing 14 includes a mounting seat 16, the mounting seat 16 is provided with an insertion hole 161, and the sun gear is inserted into the insertion hole 161 to engage with the planetary gear 11 inside the first accommodating cavity 141.

[0061] Therefore, the sun gear can be connected to the drive shaft as an input gear, and input the power of the drive shaft to the planetary reduction mechanism 1, so that the transmission device 100 starts to work.

[0062] It is understandable that the mounting base 16 and the end cover 143 are fixedly connected to the housing 142 via screws 9 , and the mounting base 16 and the end cover 143 may also be fixedly connected to the housing 142 via fasteners such as bolts, which is not limited here.

[0063] In some embodiments, the worm and worm gear transmission mechanism 2 includes a worm 21, a worm wheel 22 and a second connecting shaft 23, the worm 21 is connected to the first connecting shaft 13, the worm wheel 22 is connected to the second connecting shaft 23, the worm wheel 22 is meshed with the worm 21, the first connecting shaft 13 drives the worm 21 to rotate, and the worm wheel 22 drives the second connecting shaft 23 to rotate under the drive of the worm 21.

[0064] The worm and worm gear transmission mechanism 2 only allows the worm 21 to drive the worm wheel 22 , while the worm wheel 22 cannot drive the worm 21 , that is, the worm and worm gear transmission mechanism 2 can achieve self-locking.

[0065] In some embodiments, the second connecting shaft 23 and the worm gear 22 are an integrated structure, so that the worm gear 22 can better drive the second connecting shaft 23 to rotate.

[0066] Among them, since the second connecting shaft 23 is arranged perpendicular to the first connecting shaft 13 to achieve a 90° turn, the change of direction arrangement makes the transmission device 100 compact in structure, so that the remaining transmission components can be better arranged in space.

[0067] In some embodiments, the planetary reduction mechanism 1 further includes a first limit member 17 , which is installed at one end of the first connecting shaft 13 adjacent to the worm 21 , and is used to limit the position of the worm 21 on the first connecting shaft 13 .

[0068] Therefore, the first limiting member 17 can prevent the worm 21 from falling off or deviating from the initial position on the first connecting shaft 13, so that the transmission process of the transmission device 100 is more stable.

[0069] It can be understood that the first limiting member 17 can be, but is not limited to, a nut, and can be selected according to actual needs and is not limited here.

[0070] In some embodiments, the first connecting shaft 13 is designed as a stepped shaft, so that the worm 21 can be fixed on the first connecting shaft 13 without the first limiting member 17 .

[0071] In some embodiments, the bevel gear transmission mechanism 3 includes a first bevel gear 31, a second bevel gear 32 and a third connecting shaft 33, the first bevel gear 31 is connected to the second connecting shaft 23, the second bevel gear 32 is connected to the third connecting shaft 33, the second bevel gear 32 is meshed with the first bevel gear 31, and the second bevel gear 32 drives the third connecting shaft 33 to rotate under the drive of the first bevel gear 31, wherein the worm gear 22 and the first bevel gear 31 are coaxially arranged.

[0072] Therefore, the arrangement of the bevel gear transmission mechanism 3 can increase the reduction ratio of the transmission device 100 and improve the transmission efficiency; and the coaxial arrangement of the worm gear 22 and the first bevel gear 31 can make the structure of the transmission device 100 more compact, so as to better carry out spatial layout.

[0073] In some embodiments, the third connecting shaft 33 and the second bevel gear 32 are an integrated structure, so that the second bevel gear 32 can better drive the third connecting shaft 33 to rotate.

[0074] In some embodiments, the first bevel gear 31 is key mounted on the second connecting shaft 23 to transmit torque.

[0075] In some other embodiments, the first bevel gear 31 may also be mounted on the second connecting shaft 23 via a spline or the like.

[0076] In some other embodiments, the second connecting shaft 23 may also be designed as a stepped shaft to mount the first bevel gear 31 .

[0077] In some embodiments, Figure 4 and Figure 5 As shown, the transmission device 100 also includes a cylindrical gear transmission mechanism 4, and the cylindrical gear transmission mechanism 4 includes a first cylindrical gear 41, a second cylindrical gear 42 and a fourth connecting shaft 43, the first cylindrical gear 41 is connected to the third connecting shaft 33, the fourth connecting shaft 43 is parallel to the first connecting shaft 13, the second cylindrical gear 42 is connected to the fourth connecting shaft 43, the second cylindrical gear 42 is meshed with the first cylindrical gear 41, and the second cylindrical gear 42 drives the fourth connecting shaft 43 to rotate under the drive of the second cylindrical gear 42.

[0078] Thus, the setting of the cylindrical gear transmission mechanism 4 can increase the reduction ratio of the transmission device 100 and improve the transmission efficiency; and the fourth connecting shaft 43 is arranged parallel to the first connecting shaft 13 to better carry out spatial layout and reduce the overall size of the transmission device 100.

[0079] The transmission ratio of the cylindrical gear transmission mechanism 4 may be 1.28, which is not limited here.

[0080] In some embodiments, the third connecting shaft 33 is designed as a stepped shaft, so that the first cylindrical gear 41 can be fixed on the third connecting shaft 33 without fasteners.

[0081] In some embodiments, Figure 4 As shown, a bearing 7 and a retaining ring 8 are installed at one end of the third connecting shaft 33 close to the first cylindrical gear 41 , and the bearing 7 and the retaining ring 8 can axially position the first cylindrical gear 41 on the third connecting shaft 33 .

[0082] It is understandable that the bearing 7 may be a thrust bearing or an oil-containing bearing, which may be selected according to actual needs and is not limited here.

[0083] In some embodiments, Figure 4 and Figure 5 As shown, the cylindrical gear transmission mechanism 4 further includes a second limit member 45 , which is passed through both ends of the second cylindrical gear 42 , and is used to limit the position of the second cylindrical gear 42 on the fourth connecting shaft 43 .

[0084] Therefore, the second cylindrical gear 42 is positioned on the fourth connecting shaft 43, so as to prevent the second cylindrical gear 42 from deviating from its fixed position, thereby making the transmission process of the transmission device 100 more stable.

[0085] It can be understood that the second limiting member 45 can be but is not limited to a retaining ring 8, and the second limiting member 45 can also be a bearing 7, which is not limited here.

[0086] In some embodiments, the transmission device 100 further includes a transmission rod, one end of which is installed inside the fourth connecting shaft 43, and the transmission rod is used to output power to an external device.

[0087] Thus, the transmission rod can output the power output by the driving mechanism 300 through the four-stage transmission to an external device, so that the external device is connected to the transmission device 100 through the transmission rod to achieve deceleration.

[0088] In some embodiments, the transmission rod is spline-connected to the fourth connecting shaft 43 to transmit torque, the fourth connecting shaft 43 is hollow inside and is provided with internal splines, and the transmission rod is provided with external splines.

[0089] In some other embodiments, the transmission rod may also be connected to the fourth connecting shaft 43 by a flat key to transmit torque.

[0090] In some embodiments, the transmission device 100 further includes a second housing 5 , in which a second accommodating chamber 51 is provided. The second accommodating chamber 51 is used to accommodate the worm gear transmission mechanism 2 , the bevel gear transmission mechanism 3 and the cylindrical gear transmission mechanism 4 .

[0091] Thus, the second housing 5 can protect the worm gear transmission mechanism 2, the bevel gear transmission mechanism 3 and the cylindrical gear transmission mechanism 4, so as to extend their service life and reduce production costs.

[0092] In some embodiments, the second box body 5 includes a first protrusion 52, the first protrusion 52 is provided with a first groove 521, the second box body 5 is provided with a second groove 53, the two ends of the second connecting axis 23 are respectively installed in the first groove 521 and the second groove 53, and the second box body 5 is also provided with a third groove 54 and a fourth groove 55, the two ends of the third connecting axis 33 are respectively installed in the third groove 54 and the fourth groove 55, wherein the first groove 521 and the second groove 53 are relatively arranged on the same horizontal line, so that the second connecting axis 23 is positioned perpendicular to the first connecting axis 13 in the second box body 5, and the third groove 54 and the fourth groove 55 are relatively arranged on the same horizontal line, so that the third connecting axis 33 is positioned horizontally with the first connecting axis 13 in the second box body 5.

[0093] Thus, the first groove 521 and the second groove 53 can position the second connecting shaft 23, and the third groove 54 and the fourth groove 55 can position the third connecting shaft 33, so that it is fixed in the second accommodating cavity 51 to avoid misalignment and improve its stability in the second box body 5.

[0094] In some embodiments, Figure 4 and Figure 8 As shown, the third connecting shaft 33 is installed with a retaining ring 8 and a bearing 7 near the third groove 54. The retaining ring 8 and the bearing 7 can position and support the third connecting shaft 33 in the third groove 54. The third connecting shaft 33 is installed with a bearing 7 near the fourth groove 55 to position and support the third connecting shaft 33 in the fourth groove 55.

[0095] In some embodiments, Figure 4 and Figure 8 As shown, the inner side of the second box body 5 also includes a second protrusion 56, which is a flat plate with a certain thickness. The second protrusion 56 is parallel to the second connecting axis 23, and the second protrusion 56 is provided with a mounting hole 561. One end of the fourth connecting axis 43 is inserted into the mounting hole 561, and the other end of the fourth connecting axis 43 passes through one side of the second box body 5.

[0096] Therefore, the mounting hole 561 of the second protrusion 56 positions the fourth connecting shaft 43 to avoid misalignment and improve working stability.

[0097] In some embodiments, the outer side of the second box body 5 also includes a third protrusion 57, which is cylindrical. The third protrusion 57 is parallel to the third connecting axis 33, and the third protrusion 57 is provided with a connecting hole 571. The fourth connecting axis 43 is inserted from the connecting hole 571 so that one end of the fourth connecting axis 43 is inserted into the mounting hole 561.

[0098] In some embodiments, a first connecting shaft hole 60 is provided on a side of the second box body 5 adjacent to the first connecting shaft 13, and a first connecting shaft groove 61 is provided on a side of the second box body 5 opposite to the first connecting shaft hole 60 and away from the first connecting shaft 13. One end of the first connecting shaft 13 is inserted into the first connecting shaft hole 60 to enter the second accommodating cavity 51. After the first connecting shaft enters the second accommodating cavity 51 for a certain length, the end of the first connecting shaft 13 is inserted into the first connecting shaft groove 61 to position the first connecting shaft 13 in the second accommodating cavity 51.

[0099] In some embodiments, the cylindrical gear transmission mechanism 4 also includes a cover plate 44, which is located at the top of the fourth connecting shaft 43, and the cover plate screw 46 fixes the cover plate 44 to the end of the fourth connecting shaft 43 away from the third protrusion 57. The diameter length of the cover plate 44 is greater than or equal to the diameter length of the third protrusion 57. When installing the cylindrical gear transmission mechanism 4, the cylindrical gear transmission mechanism 4 can be axially fixed by the cover plate 44.

[0100] In some embodiments, the second box body 5 includes a first box shell 58 and a second box shell 59 , and the first box shell 58 and the second box shell 59 are matched and installed to form the second box body 5 .

[0101] It can be understood that the first box shell 58 and the second box shell 59 can be matched and installed by means of but not limited to screws 9, and the structure of the second box body 5 can also be set according to actual needs, which is not limited here.

[0102] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the 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; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A transmission device, characterized in that: include: A planetary reduction mechanism, wherein the planetary reduction mechanism is provided with a first connecting shaft; A worm gear transmission mechanism, wherein the worm gear transmission mechanism is connected to the first connecting shaft, and the worm gear transmission mechanism is provided with a second connecting shaft; A bevel gear transmission mechanism, the bevel gear transmission mechanism is connected to the second connecting shaft, and the bevel gear transmission mechanism is provided with a third connecting shaft; The second connecting axis is rotated 90 degrees relative to the first connecting axis, the third connecting axis is rotated 90 degrees relative to the second connecting axis, and the first connecting axis is parallel to the third connecting axis.

2. The transmission device according to claim 1, characterized in that: The planetary reduction mechanism includes planetary gears, a first connecting shaft and a first housing. The first housing is provided with a first accommodating cavity for accommodating the planetary gears. The first connecting shaft passes through one side of the first housing to connect the planetary gears.

3. The transmission device according to claim 2, characterized in that The planetary reduction mechanism further includes a connecting shaft positioning member, and the connecting shaft positioning member is installed on the first connecting shaft to position the first connecting shaft in the first housing.

4. The transmission device according to claim 2, characterized in that: The planetary gear includes a planetary wheel, a sun wheel, an inner gear ring and a planet carrier. The inner gear ring is installed on the inner wall of the first housing. The planetary wheel is meshed between the sun wheel and the inner gear ring. The planet carrier includes a circular shaft and a frame. One end of the planetary wheel close to the sun wheel is connected to the frame, and one end of the planetary wheel away from the sun wheel is connected to the circular shaft. The circular shaft is connected to the first connecting shaft.

5. The transmission device according to claim 4, characterized in that: The first housing includes a mounting seat, the mounting seat is provided with an insertion hole, and the sun gear is inserted into the insertion hole to engage with the planetary gear inside the first accommodating cavity.

6. The transmission device according to claim 1, characterized in that: The worm and worm gear transmission mechanism includes a worm, a worm wheel and the second connecting shaft. The worm is connected to the first connecting shaft, the worm wheel is connected to the second connecting shaft, the worm wheel is engaged with the worm, the first connecting shaft drives the worm to rotate, and the worm wheel drives the second connecting shaft to rotate under the drive of the worm.

7. The transmission device according to claim 6, characterized in that: The planetary reduction mechanism further includes a first limit member, which is installed at an end of the first connecting shaft adjacent to the worm, and is used to limit the position of the worm on the first connecting shaft.

8. The transmission device according to claim 6, characterized in that: The bevel gear transmission mechanism includes a first bevel gear, a second bevel gear and the third connecting shaft, the first bevel gear is connected to the second connecting shaft, the second bevel gear is connected to the third connecting shaft, the second bevel gear is meshed with the first bevel gear, and the second bevel gear drives the third connecting shaft to rotate under the drive of the first bevel gear, wherein the worm gear and the first bevel gear are coaxially arranged.

9. The transmission device according to claim 8, characterized in that: The transmission device also includes a cylindrical gear transmission mechanism, which includes a first cylindrical gear, a second cylindrical gear and a fourth connecting shaft, the first cylindrical gear is connected to the third connecting shaft, the fourth connecting shaft is parallel to the first connecting shaft, the second cylindrical gear is connected to the fourth connecting shaft, the second cylindrical gear is meshed with the first cylindrical gear, and the second cylindrical gear drives the fourth connecting shaft to rotate under the drive of the second cylindrical gear.

10. The transmission device according to claim 9, characterized in that: The cylindrical gear transmission mechanism further includes a second position-limiting member, which is disposed through both ends of the second cylindrical gear and is used to limit the position of the second cylindrical gear on the fourth connecting shaft.

11. The transmission device according to claim 9, characterized in that: The transmission device further comprises a second housing, wherein a second accommodating chamber is disposed in the second housing, and the second accommodating chamber is used to accommodate the worm gear transmission mechanism, the bevel gear transmission mechanism and the cylindrical gear transmission mechanism.

12. A car rear wing, characterized in that: include: The transmission device according to any one of claims 1 to 11; A driving mechanism, the driving mechanism is connected to the transmission device, and the driving mechanism is used to drive the transmission device to work; A tail body is connected to the transmission device.

13. A car, characterized in that: include: Trunk lid; The automobile rear wing as claimed in claim 12, wherein the automobile rear wing is mounted on the trunk lid, and the automobile rear wing is raised and lowered relative to the trunk lid.

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