Driving device, empennage and vehicle

Abstract

The invention relates to the technical field of empennage driving devices, and provides a driving device, an empennage and a vehicle, the driving device is used for being connected with a flap and driving the flap to rotate so that the flap can be switched from a first state to a second state, and the driving device drives the length of a first force arm of first driving force of the flap in the first state to the length of a second force arm of second driving force; a second moment arm length smaller than a second driving force for driving the flap in the second state; the downward pressure borne by the flap in the first state is smaller than the downward pressure borne by the flap in the second state. By means of the scheme, the variation amplitude of the total acting force output by the driving device in the state switching process of the driving flap is relatively small, and therefore the durability of the driving device is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of tail wing drive devices, and in particular to a drive device, a tail wing and a vehicle. Background Art

[0002] The rear wing of a vehicle generally includes a flap and a driving device for driving the flap to rotate. The driving device drives the flap to change its state to adjust the airflow speed at the rear of the vehicle, thereby improving the handling performance of the vehicle.

[0003] In the related art, the downward pressure on the flap in the first state (e.g., horizontal state) and the second state (e.g., tilted state) is different. Due to the effect of the downward pressure, the driving device has different forces to drive the flap to rotate in different states. For example, the downward pressure on the flap in the first state is less than the downward pressure on the flap in the second state. During the process of the flap turning from the first state to the second state, the force provided by the driving device gradually increases. In this case, the force provided by the driving device varies greatly between the first state and the second state of the flap, which causes a large burden on the driving device and has an adverse effect on its performance. Summary of the invention

[0004] The embodiments of the present application provide a driving device, a tail wing and a vehicle to at least partially solve the problem in the related art that the output force has a large variation range when the driving device drives the flap to rotate.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a driving device is provided for connecting the flap and driving the flap to rotate so that the flap switches from a first state to a second state, and the first lever arm length of the first driving force of the driving device to drive the flap in the first state is smaller than the second lever arm length of the second driving force to drive the flap in the second state; wherein the downforce exerted on the flap in the first state is smaller than the downforce exerted on the flap in the second state.

[0006] Optionally, the driving device includes a driving mechanism and a transmission rod, an input end of the transmission rod is connected to the driving mechanism, and an output end of the transmission rod is movably connected to the flap.

[0007] Optionally, a first angle is formed between the shortest connecting line between the output end of the transmission rod and the rotating shaft of the flap and the transmission rod, and the first angle when the flap is in the first state is smaller than the first angle when the flap is in the second state.

[0008] Optionally, when the flap is in the first state, the first angle is less than 75°; when the flap is in the second state, the first angle is greater than or equal to 75° and less than or equal to 105°.

[0009] Optionally, when the flap is in the second state, the first angle is greater than or equal to 75° and less than or equal to 90°.

[0010] Optionally, when the flap is in the second state, the first angle is equal to 90°.

[0011] Optionally, when the flap is in the first state, the first angle is greater than 0° and less than or equal to 60°.

[0012] Optionally, a first angle is formed between the shortest connecting line between the output end of the transmission rod and the rotating shaft of the flap and the transmission rod, and the first angle when the flap is in the first state is greater than the first angle when the flap is in the second state.

[0013] Optionally, when the flap is in the first state, the first angle is greater than 105°; when the flap is in the second state, the first angle is greater than or equal to 75° and less than or equal to 105°.

[0014] Optionally, when the flap is in the second state, the first angle is equal to 90°.

[0015] Optionally, the driving mechanism includes a driver, an output shaft of the driver is retractable along its length direction, and an input end of the transmission rod is drivingly connected to the output shaft of the driver.

[0016] Optionally, the driving mechanism also includes a rotating connecting rod, the input end of the rotating connecting rod is movably connected to the output shaft of the driver, and the output end of the rotating connecting rod is movably connected to the input end of the transmission rod; the rotating connecting rod is used to: when the output shaft of the driver is extended or retracted, the flap is switched between the first state and the second state.

[0017] Optionally, the rotating connecting rod includes a first connecting rod segment, a first end of the first connecting rod segment is hinged to the output shaft of the driver, and a second end of the first connecting rod segment is drivingly connected to the input end of the transmission rod.

[0018] Optionally, the rotating connecting rod also includes a second connecting rod segment, the first end of the second connecting rod segment is fixedly connected to the second end of the first connecting rod segment, and the second end of the second connecting rod segment is hinged to the input end of the transmission rod; the rotating connecting rod can rotate around the connecting axis between the first connecting rod segment and the second connecting rod segment.

[0019] Optionally, a second angle is defined between the first connecting rod segment and the output shaft of the driver, and when the flap is in the second state, the second angle is greater than or equal to 75° and less than or equal to 105°.

[0020] Optionally, when the flap is in the second state, the second angle is equal to 90°.

[0021] Optionally, when the flap is in the first state, the first angle is greater than 0° and less than or equal to 60°, and the second angle is greater than or equal to 120° and less than 180°.

[0022] Optionally, a third angle between the first connecting rod segment and the second connecting rod segment is greater than or equal to 90° and less than or equal to 150°.

[0023] Optionally, the rotating connecting rod further includes a third connecting rod segment, and the first connecting rod segment, the second connecting rod segment and the third connecting rod segment are sequentially connected end to end.

[0024] Optionally, the driver includes a hydraulic driving member, which is connected to the output shaft of the driver and is used to drive the output shaft to extend and retract along its length direction.

[0025] Optionally, the length of the transmission rod is greater than or equal to 10 mm and less than or equal to 100 mm.

[0026] According to a second aspect of the present application, a tail wing is provided, comprising: a flap and the driving device described in the first aspect, wherein the driving device is connected to the flap.

[0027] Optionally, the tail wing further includes two oppositely arranged side wings, and the flap is located between the two side wings and is hinged to the side wings.

[0028] Optionally, the flap is parallel to the horizontal plane in the first state, and the angle between the flap and the horizontal plane in the second state is greater than 0° and less than or equal to 45°.

[0029] According to a third aspect of the present application, a vehicle is also provided, comprising the tail wing described in the second aspect.

[0030] For the driving device provided in the embodiment of the present application, when the flap is in the first state, the length of the first lever arm of the first driving force used by the driving device to drive the flap to rotate to the second state is relatively small, so a larger driving force is required to drive the flap to rotate; and when the flap is in the second state, the length of the second lever arm of the second driving force used by the driving device to drive the flap to rotate to the first state is relatively large, so a smaller driving force can be applied to drive the flap to rotate. On the other hand, since the downward force applied to the flap in the first state is less than the downward force applied to the flap in the second state, when the flap is driven to rotate from the first state, a smaller driving force can be applied to overcome the downward force applied to the flap in the first state, and when the flap is driven to rotate from the first state to the second state, a larger driving force is required to overcome the downward force applied to the flap in the second state. Therefore, in the process of driving the flap to turn from the first state to the second state, the total force output by the driving device (including the driving force for driving the flap to rotate and the driving force applied to overcome the downforce exerted on the flap) changes less. This can avoid the problem of a large impact on various components in the driving device (such as a transmission rod and a rotating connecting rod, etc.) due to the large change in the total force output by the driving device in the process of driving the flap to rotate, thereby ensuring the durability of the driving device.

[0031] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0033] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0034] Figure 1 is a partial structural schematic diagram of a tail wing provided by some embodiments of the present application when the flap is in a first state;

[0035] Figure 2 is a partial structural schematic diagram of a tail provided by some embodiments of the present application when the flap is in a second state;

[0036] Figure 3 is a partial structural schematic diagram of a tail wing provided in other embodiments of the present application when the flap is in a first state;

[0037] Figure 4is a partial structural schematic diagram of a tail wing provided by other embodiments of the present application when the flap is in a second state;

[0038] Figure 5 is a top view of a tail wing provided in some embodiments of the present application;

[0039] Figure 6 is a side view of a tail wing provided in some embodiments of the present application;

[0040] Figure 7 It is a schematic diagram of the relative position relationship among the drive device, flaps and support arms in some embodiments of the present application.

[0041] Description of reference numerals:

[0042] 100. Tail wing;

[0043] 10. Driving device; 11. Driving mechanism; 111 driver; 1110 hydraulic driving member; 112 rotating connecting rod; 1121 first connecting rod segment; 1122 second connecting rod segment; 1123 third connecting rod segment; 12. transmission rod; 121 input end; 122 output end; 13. fixing frame;

[0044] 20. Flaps;

[0045] 30. Flanking;

[0046] 40. Support arm;

[0047] 50. Fixed wing;

[0048] F1, first driving force; F2, second driving force; F3, third driving force; F4, fourth driving force; L1, first lever arm; L2, second lever arm; L3, third lever arm; L4, fourth lever arm; M, shortest connecting line; P1, rotating shaft of flap; P2, connecting shaft; P3, hinge shaft of drive; α1, first angle; α2, second angle; α3, third angle. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0050] The present application provides a driving device, such as Figure 1 and Figure 2As shown, the driving device 10 is used to connect the flap 20 and drive the flap 20 to rotate around its own rotation axis P1 so that the flap 20 switches from the first state to the second state. The downward force on the flap 20 in the first state is less than the downward force on the flap 20 in the second state. Wherein, the downward force refers to: when the air flows through the upper and lower sides of the flap 20, there is a difference in wind speed, resulting in different air pressures on the upper and lower surfaces of the flap 20, and then the air pressure forms a downward pressure on the flap 20. After the flap 20 rotates around its own rotation axis P1, its inclination angle relative to the horizontal plane changes, so that the wind speed on the upper and lower sides of the flap 20 changes, and then the downward force on the flap 20 in the first state and the second state is different. As an example, when the flap 20 is in the second state, the angle between the upper side surface of the flap 20 and the horizontal plane is greater than the angle between the two when the flap 20 is in the first state, so that the downward force on the flap 20 in the first state is less than the downward force on the flap 20 in the second state. For example, the flap 20 being in the first state may mean that the flap 20 is in a horizontal state, and the flap 20 being in the second state may mean that the flap 20 is in a tilted state.

[0051] The length of the first lever arm L1 of the first driving force F1 of the driving device 10 driving the flap 20 in the first state to rotate is smaller than the length of the second lever arm L2 of the second driving force F2 driving the flap 20 in the second state to rotate.

[0052] It is worth noting that the first lever arm L1 refers to the vertical distance from the rotation axis P1 of the flap 20 to the direction of application of the first driving force F1; correspondingly, the second lever arm L2 refers to the vertical distance from the rotation axis P1 of the flap 20 to the direction of application of the second driving force F2.

[0053] Through the above arrangement, when the flap 20 is in the first state, the length of the first force arm L1 of the first driving force F1 of the driving device 10 driving the flap 20 to rotate toward the second state is relatively small, so a larger driving force is required to drive the flap 20 to rotate; and when the flap 20 is in the second state, the length of the second force arm L2 of the second driving force F2 of the driving device 10 driving the flap 20 to rotate toward the first state is relatively large, so a smaller driving force can be applied to drive the flap 20 to rotate. On the other hand, since the downward force on the flap 20 in the first state is less than the downward force on the flap 20 in the second state, when the flap 20 is driven to rotate from the first state, a smaller driving force can be applied to overcome the downward force on the flap 20 in the first state, and when the flap 20 is driven to rotate to the second state, a larger driving force is required to overcome the downward force on the flap 20 in the second state. Therefore, in the process of driving the flap 20 to turn from the first state to the second state, the total force output by the driving device 10 (including the driving force for driving the flap 20 to rotate and the driving force applied to overcome the downward pressure on the flap 20) changes less. In this way, the problem of a large impact on the various components in the driving device 10 (such as the transmission rod 12 and the rotating connecting rod 112 in the following embodiments) caused by the large change in the total force output by the driving device 10 in the process of driving the flap 20 to rotate can be avoided, thereby ensuring the durability of the driving device 10.

[0054] As an example, the driving device 10 may include a hydraulic driving component, and the flap 20 is driven to rotate by extending and retracting the hydraulic driving component.

[0055] In some embodiments, please refer to Figure 1 and Figure 2 The driving device 10 includes a driving mechanism 11 and a transmission rod 12, an input end 121 of the transmission rod 12 is connected to the driving mechanism 11, and an output end 122 of the transmission rod 12 is movably connected to the flap 20. Transmission by the transmission rod 12 is conducive to smoothly driving the flap 20 to rotate through the driving mechanism 11.

[0056] In some embodiments, please refer to Figure 1 and Figure 2 , a first angle α1 is formed between the shortest connecting line M between the output end 122 of the transmission rod 12 and the rotation axis P1 of the flap 20 and the transmission rod 12, and the first angle α1 when the flap 20 is in the first state is smaller than the first angle α1 when the flap 20 is in the second state. This arrangement can make the total force output by the drive device 10 change less in the process of switching the flap 20 from the first state to the second state, thereby ensuring the durability of the drive device 10.

[0057] In some examples, when the flap 20 is in the first state, the first angle α1 is greater than 0° and less than 75°; when the flap 20 is in the second state, the first angle α1 is greater than or equal to 75° and less than or equal to 105°. One end of the shortest line M coincides with the output end 122 of the transmission rod 12, and the other end is located on the rotation axis P1, and the shortest line M is perpendicular to the length direction of the rotation axis P1.

[0058] Through the above arrangement, when the flap 20 is in the first state, the first angle α1 between the shortest line M and the transmission rod 12 is outside the range of 75° to 105°, so that the first driving force F1 of the driving device 10 driving the flap 20 to rotate to the second state has a relatively short first force arm L1, so that a larger driving force is required to drive the flap 20 to rotate; and when the flap 20 is in the second state, the first angle α1 is within the range of 75° to 105°, so that the second driving force F2 of the driving device 10 driving the flap 20 to rotate to the first state has a relatively long second force arm L2, so that the flap 20 can be driven to rotate by applying a smaller driving force. Therefore, in the process of driving the flap 20 from the first state to the second state, the total force output by the driving device 10 has a smaller change range, so that the durability of the driving device 10 can be guaranteed.

[0059] For example, when the flap 20 is in the second state, the first angle α1 can be any angle within the range of 75° to 105°, such as 75°, 80°, 85°, 90°, 95°, 100°, 105°, etc.

[0060] As an example, when the flap 20 is in the second state, the first angle α1 is greater than or equal to 75° and less than or equal to 90°. In this case, during the rotation of the flap 20 from the first state to the second state, the force arm of the driving force of the driving device 10 for driving the flap 20 to rotate gradually increases. This can effectively ensure that during the process of driving the flap 20 to rotate, the total force output by the driving device 10 is always in a small range of change, thereby ensuring the durability of the driving device 10.

[0061] For example, when the flap 20 is in the second state, the first angle α1 may be 90°. In this case, the shortest line M is perpendicular to the length direction of the transmission rod 12, and the length of the shortest line M is the length of the second force arm L2, so that the length of the second force arm L2 can be maximized, so that the second driving force F2 is fully used to realize the rotation of the flap 20. Therefore, the driving force of the drive device 10 for driving the flap 20 to rotate can be relatively small, so that the total force output by the drive device 10 when driving the flap 20 to switch to the second state is relatively small. In addition, in the process of the flap 20 rotating from the first state to the second state, the force arm of the driving force of the drive device 10 for driving the flap 20 to rotate is always in a process of gradually increasing, which is conducive to further reducing the variation range of the total force output by the drive device 10 in the process of realizing the switching of the flap 20 from the first state to the second state, so as to ensure the durability of the drive device 10.

[0062] In some examples, when the flap 20 is in the first state, the first angle α1 is greater than 0° and less than or equal to 60°. In this case, the length of the first lever arm L1 is relatively small, so that only a part of the first driving force F1 is used to realize the rotation of the flap 20. Therefore, the driving force of the drive device 10 for driving the flap 20 to rotate can be relatively large, so that the total force output by the drive device 10 when driving the flap 20 to rotate from the first state is relatively large; this is conducive to further reducing the variation range of the total force output by the drive device 10 in the process of switching the flap 20 from the first state to the second state, thereby ensuring the durability of the drive device 10. In addition, since the first angle α1 is greater than 0° when the flap 20 is in the first state, it can avoid the length of the first lever arm L1 being 0, thereby ensuring that the first driving force F1 can drive the flap 20 to rotate.

[0063] For example, when the flap 20 is in the first state, the first angle α1 can be 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc., any angle within the interval greater than 0° and less than or equal to 60°.

[0064] In other embodiments, a first angle α1 is formed between the shortest connecting line M between the output end 122 of the transmission rod 12 and the rotation axis P1 of the flap 20 and the transmission rod 12, and the first angle α1 when the flap 20 is in the first state is greater than the first angle α1 when the flap 20 is in the second state. In this way, when the flap 20 is switched from the first state to the second state, the total force output by the drive device 10 has a smaller change range, thereby ensuring the durability of the drive device 10.

[0065] In some examples, when the flap 20 is in the first state, the first angle α1 is greater than 105° and less than 180°; when the flap 20 is in the second state, the first angle α1 is greater than or equal to 75° and less than or equal to 105°. One end of the shortest line M coincides with the output end 122 of the transmission rod 12, and the other end is located on the rotation axis P1, and the shortest line M is perpendicular to the length direction of the rotation axis P1.

[0066] Through the above arrangement, when the flap 20 is in the first state, the first angle α1 between the shortest line M and the transmission rod 12 is outside the range of 75° to 105°, so that the first driving force F1 of the driving device 10 driving the flap 20 to rotate to the second state has a relatively short first force arm L1, so that a larger driving force is required to drive the flap 20 to rotate; and when the flap 20 is in the second state, the first angle α1 is within the range of 75° to 105°, so that the second driving force F2 of the driving device 10 driving the flap 20 to rotate to the first state has a relatively long second force arm L2, so that the flap 20 can be driven to rotate by applying a smaller driving force. Therefore, in the process of driving the flap 20 from the first state to the second state, the total force output by the driving device 10 has a smaller change range, so that the durability of the driving device 10 can be guaranteed.

[0067] As an example, when the flap 20 is in the first state, the first angle α1 is greater than or equal to 120° and less than 180°. In this way, only a part of the first driving force F1 can be used to realize the rotation of the flap 20. Therefore, the driving force of the driving device 10 for driving the flap 20 to rotate can be relatively large, so that the total force output by the driving device 10 when driving the flap 20 from the first state to the second state is relatively large; this is conducive to further reducing the change range of the total force output by the driving device 10 in the process of realizing the switching of the flap 20 from the first state to the second state, thereby ensuring the durability of the driving device 10.

[0068] For example, when the flap 20 is in the first state, the first angle α1 can be 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175°, etc., any angle within the range greater than or equal to 120° and less than 180°.

[0069] In some examples, when the flap 20 is in the second state, the first angle α1 is greater than or equal to 90° and less than or equal to 105°. In this case, during the rotation of the flap 20 from the first state to the second state, the force arm of the driving force of the driving device 10 for driving the flap 20 to rotate gradually increases. This can effectively ensure that during the process of driving the flap 20 to rotate, the total force output by the driving device 10 is always in a small variation range, thereby ensuring the durability of the driving device 10.

[0070] For example, when the flap 20 is in the second state, the first angle α1 may be 90°. In this case, the length of the second force arm L2 can be maximized, so that the second driving force F2 is fully used to realize the rotation of the flap 20. Therefore, the driving force of the drive device 10 for driving the flap 20 to rotate can be relatively small, so that the total force output by the drive device 10 when driving the flap 20 to switch to the second state is relatively small. Moreover, in the process of the flap 20 rotating from the first state to the second state, the force arm of the driving force of the drive device 10 for driving the flap 20 to rotate is always in a process of gradually increasing, which is conducive to further reducing the variation range of the total force output by the drive device 10 in the process of realizing the switching of the flap 20 from the first state to the second state, so as to ensure the durability of the drive device 10.

[0071] In some embodiments, Figure 3 and Figure 4 As shown, the driving mechanism 11 includes a driver 111, the output shaft of the driver 111 can be extended and retracted along its length direction; the output shaft of the driver 111 is connected to the input end of the transmission rod 12. In this way, the transmission rod 12 can be driven by the driver 111 to switch the flap 20 between the first state and the second state.

[0072] In this embodiment, the driving mechanism 11 further includes a rotating connecting rod 112, the input end of the rotating connecting rod 112 is movably connected to the output shaft of the driver 111, and the output end of the rotating connecting rod 112 is movably connected to the input end of the transmission rod 12; the rotating connecting rod 112 is used to: when the output shaft of the driver 111 is extended and retracted, the flap 20 is switched between the first state and the second state. For example, when the flap 20 is in the first state, the first angle α1 is less than 75°, and when the flap 20 is in the second state, the first angle α1 is greater than or equal to 75° and less than or equal to 90°, the rotating connecting rod 112 can be used to: when the output shaft of the driver 111 is extended, the flap 20 is switched from the first state to the second state, and when the output shaft of the driver 111 is retracted, the flap 20 is switched from the second state to the first state.

[0073] In this case, the direction of the force of the driver 111 can be changed by rotating the connecting rod 112 , so that the force output by the driver 111 can change the state of the flap 20 .

[0074] As an example, the rotating link 112 includes a first link segment 1121 , a first end of the first link segment 1121 is hinged to the output shaft of the driver 111 , and a second end of the first link segment 1121 is drivingly connected to the input end of the transmission rod 12 .

[0075] In this embodiment, the rotating link 112 may further include a second link segment 1122, the first end of the second link segment 1122 is fixedly connected to the second end of the first link segment 1121, and the second end of the second link segment 1122 is hinged to the input end 121 of the transmission rod 12; the rotating link 112 can rotate around the connecting axis P2 between the first link segment 1121 and the second link segment 1122. In this arrangement, the driving force output by the driver 111 can be transmitted to the transmission rod 12 through the rotating link 112, and then act on the flap 20 through the transmission rod 12, thereby achieving the change of the magnitude and direction of the driving force output by the driver 111.

[0076] In some examples, the driving device 10 further includes a fixing frame 13, the driver 111 is hinged on the fixing frame 13, and the output shaft of the driver 111 can be extended and retracted along its length direction. In this case, during the process of the output shaft of the driver 111 extending and retracting along its length direction, the driver 111 can also rotate around the hinge point between it and the fixing frame 13, so as to achieve driving the first connecting rod segment 1121 to rotate around the hinge axis of the rotating connecting rod 112 (i.e., the connecting axis P2 between the first connecting rod segment 1121 and the second connecting rod segment 1122).

[0077] Through the above-mentioned arrangement, the driving force output by the driver 111 can be converted by using the rotating connecting rod 112, which is conducive to adjusting the total force output by the driver 111 during the process of switching the flap 20 from the first state to the second state, and then controlling the variation amplitude of the total force output by the driver 111 within a smaller range to ensure the durability of the drive device 10.

[0078] In some embodiments, Figure 3 As shown, there is a second angle α2 between the first connecting rod segment 1121 and the output shaft of the driver 111. When the flap 20 is in the first state, the first angle α1 is greater than 0° and less than or equal to 60°, and the second angle α2 is greater than or equal to 120° and less than 180°.

[0079] When the flap 20 switches from the first state to the second state, since the second angle α2 is greater than or equal to 120° and less than 180°, the length of the fourth force arm L4 of the fourth driving force F4 of the driver 111 used to drive the first link segment 1121 around the hinge axis of the rotating link 112 is relatively small, so the driver 111 needs to output a larger fourth driving force F4 to drive the rotating link 112 to rotate around its hinge axis. The fourth force arm L4 refers to the vertical distance from the hinge axis of the rotating link 112 to the extension line of the fourth driving force F4.

[0080] In this case, a large portion of the total force output by the driver 111 is not directly used to realize the rotation of the rotating link 112, so that the total force output by the driver 111 when driving the flap 20 from the first state to the second state is further increased, which is beneficial to further reduce the variation amplitude of the total force output by the drive device 10 when realizing the switching of the flap 20 from the first state to the second state, so as to ensure the durability of the drive device 10.

[0081] It is worth noting that, when the driving device 10 includes a hydraulic driving component, the hydraulic driving component is connected to the output shaft of the driver 111. Figure 3 and Figure 4 As shown, the hydraulic drive member extends to drive the flap 20 from the first state to the second state, and the hydraulic drive member contracts to realize the flap 20 from the second state to the first state. In the case where the flap 20 is turned from the second state to the first state, the downward force exerted on the flap will assist the contraction of the hydraulic drive member, thereby improving the response speed of the hydraulic drive member. In addition, during the state switching of the flap, since the total force output by the drive device 10 has a small change range, the pressure of the hydraulic system in the hydraulic drive member is relatively stable, thereby improving the working stability and service life of the hydraulic drive member.

[0082] In some examples, when the flap 20 is in the first state, the second angle α2 can be 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175°, etc., any angle within the interval greater than or equal to 120° and less than 180°.

[0083] In some embodiments, Figure 4 As shown, when the flap 20 is in the second state, the second angle α2 between the first connecting rod segment 1121 and the output shaft of the driver 111 is greater than or equal to 75° and less than or equal to 105°.

[0084] When the flap 20 is in the second state, since the second angle α2 is greater than or equal to 75° and less than or equal to 105°, the length of the third force arm L3 of the third driving force F3 used by the driver 111 to drive the first link segment 1121 to rotate around the hinge axis of the rotating link 112 is relatively large, so the driver 111 outputs a smaller third driving force F3 to drive the rotating link 112 to rotate around its hinge axis. The third force arm L3 refers to the vertical distance from the hinge axis of the rotating link 112 to the extension line of the third driving force F3.

[0085] In this case, most of the total force output by the driver 111 is used to realize the rotation of the rotating link 112, so that the total force output by the driver 111 to drive the flap 20 to rotate from the second state is further reduced. This is conducive to further reducing the variation amplitude of the total force output by the drive device 10 in the process of switching the flap 20 from the first state to the second state, so as to ensure the durability of the drive device 10.

[0086] In some examples, when the flap 20 is in the second state, the second angle α2 may be any angle within the range of 75° to 105°, such as 75°, 80°, 85°, 90°, 95°, 100°, or 105°.

[0087] As an example, when the flap 20 is in the second state, the second angle α2 is equal to 90°. In this case, the length of the third lever arm L3 can reach the maximum, so that the third driving force F3 is fully used to realize the rotation of the rotating link 112, so that the total force output by the driver 111 when driving the flap 20 to rotate to the second state can be effectively reduced, which is conducive to further reducing the change amplitude of the total force output by the drive device 10 in the process of switching the flap 20 from the first state to the second state, so as to ensure the durability of the drive device 10. In addition, in the case where the drive device 10 includes a hydraulic drive component, since the total force output by the driver 111 is relatively small, the response time of the hydraulic drive component can also be reduced, and the response speed of the hydraulic drive component can be improved.

[0088] In some embodiments, Figure 3 and Figure 4 As shown, the third angle α3 between the first connecting rod segment 1121 and the second connecting rod segment 1122 is greater than or equal to 90° and less than or equal to 150°.

[0089] Such an arrangement can ensure that there is a relatively large distance between one end of the first connecting rod segment 1121 hinged to the output shaft of the driver 111 and one end of the second connecting rod segment 1122 hinged to the transmission rod 12, thereby facilitating avoiding mutual interference between the rotation of the rotating connecting rod 112, the movement of the transmission rod 12 and the rotation of the flap 20, thereby ensuring the working stability of the drive device 10.

[0090] In some examples, the third angle α3 may be 90°, 100°, 110°, 120°, 130°, 140°, 150°, or any other angle within the range of 90° to 150°.

[0091] In some embodiments, please refer to Figure 3 and Figure 4 The rotating link 112 also includes a third link segment 1123, and the first link segment 1121, the second link segment 1122 and the third link segment 1123 are connected end to end in sequence.

[0092] Such an arrangement can improve the structural stability of the rotating connecting rod 112, thereby improving the use stability and service life of the driving mechanism 11.

[0093] In some examples, the first link segment 1121, the second link segment 1122, and the third link segment 1123 may be integrally formed, which may further enhance the structural stability of the rotating link 112.

[0094] In some embodiments, please refer to Figure 3 and Figure 4 , the length of the transmission rod 12 is greater than or equal to 10 mm and less than or equal to 100 mm.

[0095] Through the above arrangement, on the one hand, the transmission rod 12 can have a relatively large length, so as to facilitate the hinge connection between its two ends and the second connecting rod segment 1122 and the flap 20 respectively. On the other hand, it can also prevent the transmission rod 12 from being too long and easily breaking during the transmission of force.

[0096] In some examples, the length of the transmission rod 12 can be 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, etc., and any angle within the range of 10 mm to 100 mm.

[0097] In some examples, the material of at least one of the transmission rod 12 and the rotating link 112 includes a mixture of one or more of 304 stainless steel, Zl104 cast aluminum, Zl105 cast aluminum, or Zl105A cast aluminum, so that at least one of the transmission rod 12 and the rotating link 112 has good castability and mechanical properties.

[0098] In some embodiments, please refer to Figure 3 and Figure 4 The driver 111 includes a hydraulic driver 1110, which is connected to the output shaft of the driver 111 and is used to drive the output shaft to extend and retract along its length. In this case, the output shaft of the hydraulic driver 1110 can be directly used as the output shaft of the driver 111.

[0099] As an example, the stroke range of the output shaft of the driver 111 is less than or equal to 50 mm. In this way, the output shaft of the driver 111 can switch the flap 20 between the first state and the second state within a relatively small stroke range, thereby avoiding the problem of the driver 111 occupying too much space as a whole.

[0100] In some examples, the hydraulic drive 1110 may be a double-acting hydraulic cylinder, which may establish positive pressure during the process of switching the flap 20 between the first state and the second state, so as to further enhance the drag reduction effect of the flap 20 .

[0101] In other examples, the driver 111 may also be driven by a motor, a pneumatic driver, etc. Furthermore, the driver 111 may also include a transmission structure such as a rigid rope, a worm gear, etc. to achieve the adjustment of the force (eg, the direction of the force).

[0102] Some embodiments of the present application also provide a tail wing, such as Figure 5 As shown, the tail 100 includes a flap 20 and a driving device 10 as described in any of the above embodiments. The driving device 10 is connected to the flap 20, so as to drive the flap 20 to switch from a first state to a second state.

[0103] Since the length of the first lever arm L1 of the first driving force F1 used by the driving device 10 to drive the flap 20 in the first state to rotate is smaller than the length of the second lever arm L2 of the second driving force F2 used to drive the flap 20 in the second state to rotate, in the process of driving the flap 20 from the first state to the second state, the total force output by the driving device 10 (including the driving force used to drive the flap 20 to rotate and the driving force applied to overcome the downward pressure on the flap 20) changes less, thereby avoiding a large impact on various components in the driving device 10 (such as the transmission rod 12 and the rotating connecting rod 112, etc.) due to the large change in the total force output by the driving device 10, thereby ensuring the durability of the driving device 10.

[0104] Since the rear wing 100 includes the driving device 10, the rear wing 100 has the technical effects of the driving device 10 in any of the above embodiments, which will not be described in detail here.

[0105] In some embodiments, the tail 100 further includes two oppositely disposed side wings 30, the flap 20 is located between the two side wings 30, and the flap 20 is hingedly disposed with the side wings 30. The side wings 30 can be used to fix the position of the flap 20.

[0106] In some embodiments, please refer to Figure 5 The tail 100 further includes a support arm 40 , and the driving device 10 is installed in the accommodating space of the support arm 40 .

[0107] like Figure 6 As shown, when the driving device 10 includes a driver 111, a rotating connecting rod 112 and a transmission rod 12, the support arm 40 may be in a swan neck-like curved shape, and the cross section of the support arm 40 may be in a teardrop shape, so that the driving device 10 can be well installed in the accommodation space of the support arm 40. The base of the support arm 40 may be connected to the back door or the trunk cover of the vehicle, so that the support arm 40 is fixed.

[0108] It is worth noting that, when the driving device 10 includes a fixing frame 13, the fixing frame 13 can be used as a part of the support arm 40, so that the driver 111 can be directly hinged to the support arm 40. Figure 7 As shown, the driver 111 is hinged to the support arm 40 at the hinge axis P3 of the driver. As another example, the fixing frame 13 can be used as a solid component. After the driver 111 is hinged to the fixing frame 13, the fixing frame 13 can be fixed to the support arm 40.

[0109] In some examples, two groups of driving devices 10 may be provided, and two support arms 40 may be provided, and each group of driving devices 10 is located in the accommodation space of one support arm 40 .

[0110] It is worth noting that the embodiments of the present application and the accompanying drawings only exemplify or illustrate one set of flaps 20. In actual implementation, there may be multiple sets of flaps 20. Multiple sets of flaps 20 may be driven by the same set of drive devices 10, or may be controlled separately by multiple sets of drive devices 10, which is not limited in the embodiments of the present application.

[0111] In some examples, the tail 100 further includes a fixed wing 50, which is located between the two side wings 30 and connected to the two side wings 30. As an example, the fixed wing 50 can also be connected to the support arm 40 to further improve the stability of the two.

[0112] In some embodiments, the flap 20 is parallel to the horizontal plane in the first state, and the angle between the flap 20 and the horizontal plane in the second state is greater than 0 and less than or equal to 45°. That is, the flap 20 is in a horizontal state in the first state, and the flap 20 is in an inclined state in the second state. When the flap 20 is in a horizontal state, a large downforce is generated when the airflow flows through the flap, thereby improving the stability and maneuverability of the vehicle when turning; when the flap 20 is in an inclined state, the frontal area of ​​the flap 20 is reduced, and the wind resistance is reduced, thereby increasing the speed of the vehicle when driving on a straight road.

[0113] In the case where the driver 111 includes a hydraulic driver 1110, please continue to refer to Figure 3 and Figure 4 In the stage when the flap 20 turns from the first state to the second state, the hydraulic system inside the hydraulic drive component establishes positive pressure, so that the output shaft of the driver 111 extends along its length direction, and drives the angle between the upper surface of the flap 20 and the horizontal plane to increase. In this process, the hydraulic system can obtain the assistance of wind pressure, thereby increasing the response time of the flap 20 before entering the curve, thereby effectively extending the time for changing the wind resistance by the flap 20 at the end of the straight. In the stage when the flap 20 turns from the second state to the first state, the output shaft of the driver 111 shrinks along its length direction, and the angle between the upper surface of the flap 20 and the horizontal plane decreases. In this process, the vehicle exits the curve and the speed decreases, so that the downforce formed by the wind resistance on the flap 20 is relatively small, and the negative impact of the wind resistance on the hydraulic system to maintain the flap 20 in the second state is effectively weakened, which is conducive to achieving a rapid response to the state switching of the flap 20. Therefore, the above-mentioned drive device 10 and the tail wing 100 can effectively adapt to the switching logic of the flap 20 state in the vehicle, thereby improving its use performance.

[0114] Some embodiments of the present application further provide a vehicle, comprising the rear wing 100 described in any of the above embodiments.

[0115] Since the vehicle includes the rear wing 100 , the vehicle has the technical effects of the rear wing 100 , which will not be described in detail here.

[0116] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this embodiment of the present application does not limit this.

[0117] Since the rear wing 100 can effectively adapt to the switching logic of the flap 20 state in the vehicle, the vehicle can be used as a racing car.

[0118] In the description of this application, the methods of "connection" and "fixation" include but are not limited to bolt connection, rivet fixation, bonding, embedding, etc. or a combination of multiple methods. The method of "movable connection" can be hinged.

[0119] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0120] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0121] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0122] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A driving device, characterized in that: used to connect the flap (20) and drive the flap (20) to rotate so that the flap (20) switches from a first state to a second state, The length of a first lever arm (L1) of a first driving force (F1) of the driving device (10) driving the flap (20) in the first state is smaller than the length of a second lever arm (L2) of a second driving force (F2) driving the flap (20) in the second state; Wherein, the downforce to which the flap (20) is subjected in the first state is smaller than the downforce to which the flap (20) is subjected in the second state.

2. The driving device according to claim 1, characterized in that: The driving device (10) comprises: a driving mechanism (11), and A transmission rod (12), wherein an input end (121) of the transmission rod is connected to the driving mechanism (11), and an output end (122) of the transmission rod is movably connected to the flap (20).

3. The driving device according to claim 2, characterized in that: A first angle (α1) is formed between the shortest connecting line (M) between the output end (122) of the transmission rod and the rotation axis (P1) of the flap (20) and the transmission rod (12), and the first angle (α1) when the flap (20) is in the first state is smaller than the first angle (α1) when the flap (20) is in the second state.

4. The driving device according to claim 3, characterized in that: When the flap (20) is in the first state, the first angle (α1) is less than 75°; when the flap (20) is in the second state, the first angle (α1) is greater than or equal to 75° and less than or equal to 105°.

5. The driving device according to claim 4, characterized in that: When the flap (20) is in the second state, the first angle (α1) is greater than or equal to 75° and less than or equal to 90°.

6. The driving device according to claim 5, characterized in that: When the flap (20) is in the second state, the first angle (α1) is equal to 90°.

7. The driving device according to claim 4, characterized in that: When the flap (20) is in the first state, the first angle (α1) is greater than 0° and less than or equal to 60°.

8. The driving device according to claim 2, characterized in that: A first angle (α1) is formed between the shortest connecting line (M) between the output end (122) of the transmission rod and the rotation axis (P1) of the flap (20) and the transmission rod (12), and the first angle (α1) when the flap (20) is in the first state is greater than the first angle (α1) when the flap (20) is in the second state.

9. The driving device according to claim 8, characterized in that: When the flap (20) is in the first state, the first angle (α1) is greater than 105°; when the flap (20) is in the second state, the first angle (α1) is greater than or equal to 75° and less than or equal to 105°.

10. The driving device according to claim 9, characterized in that: When the flap (20) is in the second state, the first angle (α1) is equal to 90°.

11. The driving device according to any one of claims 2 to 10, characterized in that: The driving mechanism (11) comprises a driver (111), and the output shaft of the driver (111) can be extended and retracted along its length direction; The input end of the transmission rod (12) is in transmission connection with the output shaft of the driver (111).

12. The driving device according to claim 11, characterized in that: The driving mechanism (11) further comprises: A rotating connecting rod (112), wherein the input end of the rotating connecting rod (112) is movably connected to the output shaft of the driver (111), and the output end of the rotating connecting rod (112) is movably connected to the input end of the transmission rod (12); The rotating connecting rod (112) is used to switch the flap (20) between the first state and the second state when the output shaft of the driver (111) is extended or retracted.

13. The driving device according to claim 12, characterized in that: The rotating connecting rod (112) comprises: A first connecting rod section (1121), wherein the first end of the first connecting rod section (1121) is hinged to the output shaft of the driver (111), and the second end of the first connecting rod section (1121) is transmission-connected to the input end of the transmission rod (12).

14. The driving device according to claim 13, characterized in that: The rotating connecting rod (112) further comprises: A second connecting rod segment (1122), wherein the first end of the second connecting rod segment (1122) is fixedly connected to the second end of the first connecting rod segment (1121), and the second end of the second connecting rod segment (1122) is hinged to the input end (121) of the transmission rod; The rotating link (112) can rotate around the connecting axis (P2) of the first link segment (1121) and the second link segment (1122).

15. The driving device according to claim 13, characterized in that: A second angle (α2) is formed between the first connecting rod segment (1121) and the output shaft of the driver (111); when the flap (20) is in the second state, the second angle (α2) is greater than or equal to 75° and less than or equal to 105°.

16. The driving device according to claim 15, characterized in that: When the flap (20) is in the second state, the second angle (α2) is equal to 90°.

17. The driving device according to claim 15, characterized in that: When the flap (20) is in the first state, the first angle (α1) is greater than 0° and less than or equal to 60°, and the second angle (α2) is greater than or equal to 120° and less than 180°.

18. The driving device according to claim 14, characterized in that: A third angle (α3) between the first connecting rod segment (1121) and the second connecting rod segment (1122) is greater than or equal to 90° and less than or equal to 150°.

19. The driving device according to claim 14, characterized in that: The rotating connecting rod (112) further comprises a third connecting rod segment (1123), and the first connecting rod segment (1121), the second connecting rod segment (1122) and the third connecting rod segment (1123) are sequentially connected end to end.

20. The driving device according to claim 11, characterized in that The driver (111) comprises a hydraulic driving component (1110), wherein the hydraulic driving component (1110) is connected to an output shaft of the driver (111) and is used to drive the output shaft to extend and retract along its length direction.

21. The driving device according to any one of claims 2 to 10, characterized in that: The length of the transmission rod (12) is greater than or equal to 10 mm and less than or equal to 100 mm.

22. A tail wing, characterized in that: include: Flaps (20); as well as The drive device (10) according to any one of claims 1 to 21, wherein the drive device (10) is connected to the flap (20).

23. The tail wing according to claim 22, characterized in that Also includes: two side wings (30) arranged opposite to each other; The flap (20) is located between the two side wings and is hinged to the side wings (30).

24. The tail wing according to claim 22, characterized in that The flap (20) is parallel to the horizontal plane in the first state, and the angle between the flap (20) and the horizontal plane in the second state is greater than 0° and less than or equal to 45°.

25. A vehicle, characterized in that: A tail wing (100) comprising any one of claims 22-24.

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