Car rear cover drive device

Abstract

The present disclosure provides a car rear cover drive device, comprising: a gearbox assembly, a motor assembly, a threaded rod assembly and a nut tube assembly; the gearbox assembly transmits the motion output by the motor assembly to the threaded rod assembly, causing the threaded rod assembly to rotate; the threaded rod assembly and the nut tube assembly are connected by threaded fitting; the rotation of the threaded rod assembly drives the nut tube assembly to rotate, causing the nut tube assembly to reciprocate along the axial direction of the threaded rod assembly.

Description

Technical Field

[0001] The present disclosure relates to a vehicle rear cover driving device. Background Art

[0002] In the automobile market, with the decline in vehicle prices and the popularization of intelligent product applications, more and more brands of cars have been equipped with electric tailgate functions. This function uses a drive device to automatically open and close the tailgate, further improving customer convenience. This function also allows customers to remotely operate, detect obstacles, and open the car intelligently, which greatly enhances the technological sense of the entire vehicle.

[0003] In the prior art, the rear cover drive device used mainly includes a rocker arm drive device, such as Figure 1 As shown, the system comprises a motor 1′, a rocker arm 2′, and a connecting rod 3′. The motor 1′ is typically fixed to the vehicle body, with the rocker arm 2′ and connecting rod 3′ connected via a ball joint. The connecting rod 3′ is then connected to a rear lid hinge 4′ via a ball joint, which is then fixed to the rear lid 5′. The principle is as follows: after the user issues a control command via a control device, the motor 1′, after increasing torque through gear reduction, drives the rocker arm 2′ to rotate. The rocker arm 2′, in turn, drives the rear lid hinge 4′ via the connecting rod 3′, thereby causing the rear lid 5′ to open or close in response to the rotation of the motor 1′. This type of drive device is typically bulky and costly. Furthermore, since the rocker arm 2′ and connecting rod 3′ require a large space for rotation, they occupy a significant amount of space within the luggage compartment (trunk), impacting luggage compartment capacity and user usability. Summary of the Invention

[0004] In order to solve at least one of the above technical problems, the present disclosure provides a car rear cover driving device, and the car rear cover driving device of the present disclosure is implemented through the following technical solutions.

[0005] A car rear cover drive device includes: a gearbox assembly, a motor assembly, a threaded rod assembly and a nut tube assembly; the gearbox assembly transmits the motion output by the motor assembly to the threaded rod assembly, causing the threaded rod assembly to rotate; the threaded rod assembly and the nut tube assembly are connected by threaded fitting; the rotation of the threaded rod assembly drives the nut tube assembly to rotate, causing the nut tube assembly to reciprocate along the axial direction of the threaded rod assembly.

[0006] According to at least one embodiment of the present disclosure, the automobile rear cover drive device also includes a first ball and socket assembly and a second ball and socket assembly; the first ball and socket assembly is fixedly connected to the gear box assembly, and the nut tube assembly is fixedly connected to the second ball and socket assembly.

[0007] According to at least one embodiment of the present disclosure, the automobile rear cover drive device also includes a spring, which is sleeved on the outside of the threaded rod assembly and the nut tube assembly; the first end of the spring is fixedly connected to the first ball and socket assembly, and the second end of the spring is fixedly connected to the second ball and socket assembly.

[0008] In accordance with at least one embodiment of the present disclosure, the gearbox assembly includes a worm gear mechanism that commutates motion output by the motor assembly.

[0009] According to at least one embodiment of the present disclosure, the worm gear transmission mechanism includes a worm wheel and a worm, and the automobile tailgate drive device further includes a coupling, through which the worm is connected to the motor assembly.

[0010] According to at least one embodiment of the present disclosure, the coupling includes a first connecting member, a second connecting member and a third connecting member, the second connecting member is arranged between the first connecting member and the third connecting member, the first connecting member and the third connecting member are rigid components, and the second connecting member is a non-rigid component.

[0011] According to at least one embodiment of the present disclosure, the first connecting member, the second connecting member and the third connecting member are all finger-shaped members, and the three are staggered and matched so that no relative displacement occurs among the three along the circumference of the coupling.

[0012] According to at least one embodiment of the present disclosure, the threaded rod assembly includes a threaded rod, and the nut tube assembly includes a nut and a nut tube, and the nut is fixed to the first end of the nut tube; the first end of the threaded rod is connected to the inner ring of the worm wheel of the worm gear transmission mechanism through a spline, and the threaded rod is connected to the nut of the nut tube assembly through threaded cooperation.

[0013] According to at least one embodiment of the present disclosure, a limiting assembly is configured at the second end of the threaded rod, and a concave ring is formed on the circumference of the nut tube. The limiting assembly and the concave ring prevent the nut tube assembly from being disengaged from the threaded tube assembly.

[0014] According to at least one embodiment of the present disclosure, the first ball-and-socket assembly is on the vehicle body side, and the second ball-and-socket assembly is on the vehicle tailgate hinge side. The vehicle body side ball-and-socket assembly is connected to a ball head of the vehicle body via a ball-and-socket arrangement, and the vehicle tailgate hinge side ball-and-socket assembly is connected to a ball head of the vehicle tailgate hinge via a ball-and-socket arrangement. The tailgate drive device is connected between the vehicle body and the tailgate hinge.

[0015] According to at least one embodiment of the present disclosure, the nut tube assembly is fixedly connected to the second ball and socket assembly via the second end of the nut tube.

[0016] According to at least one embodiment of the present disclosure, the helix angle of the worm gear is parallel to the axial direction of the threaded rod.

[0017] According to at least one embodiment of the present disclosure, the spring is a tension spring or a compression spring, and the spring is a cylindrical coil spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0019] Figure 1 This is a structural diagram of a car rear cover drive device (rocker arm drive device) in the prior art.

[0020] Figure 2 It is a schematic structural diagram of a vehicle rear cover driving device according to one embodiment of the present disclosure.

[0021] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of a vehicle rear cover drive device according to one embodiment of the present disclosure.

[0022] Figure 4 It is a schematic diagram of the cooperation of the first connecting member, the second connecting member and the third connecting member of the coupling of the automobile tailgate drive device according to one embodiment of the present disclosure.

[0023] Figure 5 It is a schematic diagram of the matching of a threaded rod assembly and a nut tube assembly of a car rear cover drive device according to one embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the relevant content and are not intended to limit the present disclosure. It should also be noted that, for ease of description, only the portions relevant to the present disclosure are shown in the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure can be combined with each other. The technical solution of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Unless otherwise stated, the exemplary embodiments / examples shown are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of the various embodiments / examples may be further combined, separated, interchanged, and / or rearranged without departing from the technical concepts of the present disclosure.

[0027] The use of cross hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise indicated, the presence or absence of cross hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the order described. In addition, the same figure numbers represent the same components.

[0028] When a component is referred to as being “on,” “over,” “connected to,” or “coupled to” another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another component, there are no intervening components present. For this purpose, the term “connected” may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0029] For descriptive purposes, the present disclosure may use spatially relative terms such as "below," "beneath," "under," "down," "above," "upper," "above," "higher," and "side (e.g., as in "sidewall")," to describe the relationship of one component to another (other) component as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the drawings is turned over, a component described as "below" or "beneath" another component or feature would then be positioned "above" the other component or feature. Thus, the exemplary term "below" can encompass both the "above" and "below" orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and as such, the spatially relative descriptors used herein should be interpreted accordingly.

[0030] The terms used herein are for the purpose of describing specific embodiments and are not intended to be restrictive. As used herein, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, the features, integral bodies, steps, operations, parts, assemblies and / or their groups stated are explained, but the presence or addition of one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups is not excluded. It should also be noted that, as used herein, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values and / or the values provided that will be recognized by those of ordinary skill in the art.

[0031] like Figure 2 As shown, an automobile tailgate drive device according to an embodiment of the present invention includes: a gearbox assembly 2, a motor assembly 3, a threaded rod assembly 4 and a nut tube assembly 5; the gearbox assembly 2 transmits the motion output by the motor assembly 3 to the threaded rod assembly 4, causing the threaded rod assembly 4 to rotate; the threaded rod assembly 4 and the nut tube assembly 5 are connected through threaded fitting; the rotation of the threaded rod assembly 4 drives the nut tube assembly 5 to rotate, causing the nut tube assembly 5 to reciprocate along the axial direction of the threaded rod assembly 4.

[0032] Those skilled in the art will appreciate that the automobile tailgate drive device in this embodiment can be installed between the automobile body and the tailgate to drive the tailgate. Those skilled in the art will also appreciate that the motor assembly 3 has an output shaft, and the motion (rotation) output by the output shaft of the motor assembly 3 is transmitted to the threaded rod assembly 4. Through the threaded connection between the threaded rod assembly 4 and the nut tube assembly 5, the nut tube assembly 5 rotates driven by the rotation of the threaded rod assembly 4, thereby causing the nut tube assembly 5 to reciprocate along the axial direction of the threaded rod assembly 4, or in other words, to cause the nut tube assembly 5 to move linearly forward and backward along the threaded rod assembly 4.

[0033] Preferably, the automobile tailgate driving device of the above embodiment further includes a first ball and socket assembly 1 and a second ball and socket assembly 7 ; the first ball and socket assembly 1 is fixedly connected to the gearbox assembly 2 , and the nut tube assembly 5 is fixedly connected to the second ball and socket assembly 7 .

[0034] According to one embodiment of the present disclosure, the first ball and socket assembly 1 is a car body side ball and socket assembly 1, and the second ball and socket assembly 7 is a car rear cover hinge side ball and socket assembly 7; the car body side ball and socket assembly 1 is connected to the ball head of the car body through a ball socket, and the car rear cover hinge side ball and socket assembly 7 is connected to the ball head of the car rear cover hinge through a ball socket, thereby realizing the connection of the car rear cover drive device of the present disclosure between the car body and the car rear cover.

[0035] Combine Figure 2 The structural diagram of the automobile rear cover drive device shown is as follows Figure 3 The exploded perspective view of the vehicle rear cover drive device is shown. Preferably, the first ball and socket assembly 1 (the vehicle body side ball and socket assembly 1) is fastened to the gearbox assembly 2 by screws 8. Figure 3 Four screws 8 are shown, but the present disclosure does not limit the number of screws 8. Those skilled in the art can make appropriate selections of the number of screws 8. Preferably, the motor assembly 3 is fastened to the gearbox assembly 2 by screws 9. Figure 3 Three screws 9 are shown, but the present disclosure does not limit the number of screws 9 , and those skilled in the art can make a suitable selection of the number of screws 9 .

[0036] The cooperation between the ball socket and the ball head belongs to the existing technology in this field and will not be described in detail in this disclosure.

[0037] Preferably, if Figure 2 and Figure 3 As shown, the automobile rear cover drive device in the above embodiment also includes a spring 6, which is sleeved on the outside of the threaded rod assembly 4 and the nut tube assembly 5; the first end of the spring 6 is fixedly connected to the first ball and socket assembly 1, and the second end of the spring 6 is fixedly connected to the second ball and socket assembly 7.

[0038] The extending direction of the spring 6 is the same as the reciprocating direction of the nut tube assembly 5 .

[0039] To balance the weight of the vehicle's tailgate, the disclosed tailgate drive device features a spring 6 secured between the gearbox assembly 2 and the second ball-and-socket assembly 7 (the tailgate hinge-side ball-and-socket assembly 7). The force of spring 6 is preferably selected based on the weight of the vehicle's tailgate. To conserve space, spring 6 is coaxially mounted outside the threaded rod assembly 4 and the nut tube assembly 5. Depending on the configuration of the disclosed tailgate drive device, spring 6 can be either a tension spring or a compression spring.

[0040] When the first ball and socket assembly 1 (the ball and socket assembly 1 on the automobile body side) is arranged at a position relative to the rear of the automobile, and the second ball and socket assembly 7 (the ball and socket assembly 7 on the automobile rear cover hinge side) is arranged at a position relative to the front of the automobile, the distance between the first ball and socket assembly 1 (the ball and socket assembly 1 on the automobile body side) and the second ball and socket assembly 7 (the ball and socket assembly 7 on the automobile rear cover hinge side) decreases, indicating that the rear cover is opened. At this time, the spring 6 is a tension spring.

[0041] When the first ball and socket assembly 1 (the ball and socket assembly 1 on the automobile body side) is arranged in a position relative to the front of the automobile, and the second ball and socket assembly 7 (the ball and socket assembly 7 on the automobile rear cover hinge side) is arranged in a position relative to the rear of the automobile, the increase in the distance between the first ball and socket assembly 1 (the ball and socket assembly 1 on the automobile body side) and the second ball and socket assembly 7 (the ball and socket assembly 7 on the automobile rear cover hinge side) represents the opening of the rear cover, and at this time the spring is a compression spring.

[0042] like Figure 3 As shown, preferably, the gearbox assembly 2 includes a worm gear transmission mechanism 10 , 11 , which includes a worm wheel 11 and a worm 10 , and the worm gear transmission mechanism 10 , 11 commutates the motion output by the motor assembly 3 .

[0043] The worm 10 and worm wheel 11 within the gearbox assembly 2 cooperate to convert the motion (rotational motion) of the worm 10 into the rotational motion of the worm wheel 11. The worm wheel 11 and worm 10 enable the motor assembly 3 to be positioned non-coaxially with the gearbox assembly 2, eliminating the need for conventional planetary gear transmissions. This optimizes the cost and length of the disclosed automotive tailgate drive device.

[0044] The automobile tailgate driving device of this embodiment further includes couplings 16 , 17 , 18 , through which the output shaft (not shown) of the motor assembly 3 is connected to the worm 10 inside the gearbox assembly 2 .

[0045] Preferably, the coupling of the automobile tailgate drive device disclosed herein includes a first coupling member 16, a second coupling member 17, and a third coupling member 18. The second coupling member 17 is disposed between the first coupling member 16 and the third coupling member 18. The first coupling member 16 and the third coupling member 18 are rigid components, while the second coupling member 17 is a non-rigid component. Those skilled in the art will understand that a rigid component refers to a component that is not easily deformed, preferably a metal component (e.g., a cast iron component, a steel component, an alloy component, etc.), while a non-rigid component refers to a component that is easily deformed, preferably a hard rubber component. In the present disclosure, it is preferred that the first coupling member 16 and the third coupling member 18 be metal components, while the second coupling member 17 be a hard rubber component.

[0046] When the motor assembly 3 is running, transient impacts are absorbed by the deformation of the rubber of the hard rubber component 17, thereby optimizing the fluctuation of the output of the motor assembly 3 and obtaining a smoother output, making the electric operation of the automobile tailgate drive device disclosed in the present invention more stable.

[0047] Figure 4The figure is a schematic diagram of the coordination of the first coupling 16, the second coupling 17, and the third coupling 18 of the coupling of the automobile tailgate drive device according to one embodiment of the present disclosure. The torque transmission of the motor assembly 3 is achieved through the coordinated first coupling 16 (metal finger assembly 16), the third coupling 18 (metal finger assembly 18), and the second coupling 17 (hard rubber component 17). The first coupling 16, the second coupling 17, and the third coupling 18 are all finger-shaped members, and the first coupling 16, the second coupling 17, and the third coupling 18 are staggered so that the first coupling 16, the second coupling 17, and the third coupling 18 do not move relative to each other along the circumference of the coupling. Those skilled in the art will understand that Figure 4 The shapes of the first connecting member 16, the second connecting member 17 and the third connecting member 18 shown are the preferred shapes shown in the present disclosure. In light of the present disclosure, those skilled in the art can make appropriate changes to the shapes of the first connecting member 16, the second connecting member 17 and the third connecting member 18 so that the first connecting member 16, the second connecting member 17 and the third connecting member 18 do not undergo relative displacement along the circumference of the coupling.

[0048] Figure 5 Schematic diagram of the matching of the threaded rod assembly 4 and the nut tube assembly 5 of the automobile rear cover drive device according to one embodiment of the present disclosure. Figure 3 and Figure 5 The threaded rod assembly 4 includes a threaded rod 12, and the nut tube assembly 5 includes a nut 14 and a nut tube 15. The nut 14 is fixed to the first end of the nut tube 15; the first end of the threaded rod 12 is connected to the inner ring of the worm wheel 11 of the worm gear transmission mechanism through a spline, and the threaded rod 12 is connected to the nut 14 of the nut tube assembly 5 through threaded cooperation.

[0049] Combine Figure 3 and Figure 5 In more detail, the nut 14 in the nut tube assembly 5 is fixed to the nut tube 15. The threaded rod 12 in the threaded rod assembly 4 and the nut 14 in the nut tube 15 are threadedly matched. The rotation of the threaded rod assembly 4 drives the nut tube assembly 5 to move linearly forward and backward along the threaded rod 12. The second end of the nut tube 15 in the nut tube assembly 5 is fixed to the ball socket assembly 7 on the hinge side of the automobile rear cover. The first end of the threaded rod assembly 4 is fixed in the gear box assembly 2. The gear box assembly 2 is fixed together with the ball socket assembly 1 on the vehicle body side. The rotation of the threaded rod 12 causes the ball socket assembly 1 on the vehicle body side and the ball socket assembly 7 on the hinge side of the automobile rear cover to expand and contract linearly along the axis of the threaded rod 12, thereby driving the opening and closing of the automobile rear cover.

[0050] The inner ring of worm gear 11 engages with threaded rod 12 within threaded rod assembly 4 via a spline, thereby driving the rotation of threaded rod 12. To improve transmission efficiency, the helix angle of worm gear 11 is parallel to the axial direction of threaded rod 12, allowing all the energy transferred from worm gear 10 to worm gear 11 to be used to drive its rotation. Furthermore, in non-electric operation, the user's manual operating force, transmitted from the vehicle's rear hood, is reversely transferred to worm gear 11 via threaded rod 12, driving motor assembly 3 to rotate, thus optimizing the user's manual operating force.

[0051] like Figure 5 As shown, preferably, a limit assembly 13 is configured at the second end of the threaded rod 12 of the threaded rod assembly 4, and a concave ring 19 is formed on the circumference of the nut tube 15. The limit assembly 13 and the concave ring 19 prevent the nut tube assembly 5 from being disengaged from the threaded rod assembly 4. Preferably, the concave ring 19 is configured in the middle of the nut tube 15. Figure 5 Preferably, one concave ring 19 is shown. Those skilled in the art should understand that the present disclosure does not specifically limit the number of concave rings 19 .

[0052] To prevent the car's rear hood from over-opening, a limit assembly 13 is riveted to the end (second end) of threaded rod 12 within threaded rod assembly 4. A press-riveted nut tube concave ring 19 is attached to nut tube 15 within nut tube assembly 5. Under extreme operating conditions, nut tube 15 will reach the end (second end) of threaded rod 12 and be restrained by nut tube concave ring 19 and limit assembly 13 within threaded rod assembly 4, preventing nut tube assembly 5 from disengaging from threaded rod assembly 4 and ensuring component integrity.

[0053] In one embodiment of the present disclosure, the motor within the motor assembly of the vehicle's rear lid drive receives a voltage input from a vehicle controller and begins operating. After passing through a coupling, the motor drives the worm gear within the gearbox assembly, which then rotates via the splines within the worm gear, causing the threaded rod assembly to rotate, thereby causing the nut tube assembly, which engages the threaded rod assembly, to move forward and backward along the threaded rod. The other end of the nut tube assembly is connected to the ball socket of the vehicle's rear lid hinge. The ball socket assembly on the rear lid hinge side of the vehicle is connected to the hinge via a ball joint. The gearbox assembly is fixed to the ball socket assembly on the vehicle body side of the vehicle. The ball socket assembly on the vehicle body side of the vehicle is connected to the vehicle body via a ball joint. This converts the motor's rotational motion into linear telescopic motion of the electric rear lid drive, pushing and pulling the rear lid hinge, thereby electrically opening and closing the rear lid.

[0054] The disclosed automobile rear lid drive device drives the threaded rod on the threaded rod assembly to rotate via a motor assembly and a gearbox assembly, causing the nut tube assembly on the threaded rod to move linearly forward and backward along the threaded rod, pushing the automobile rear lid hinge and achieving opening and closing of the rear lid. A spring coaxially arranged with the threaded rod assembly and the nut tube assembly balances the weight of the automobile rear lid, effectively reducing the torque requirement of the motor. The movement of the motor assembly is transmitted via a worm gear transmission mechanism of the gearbox assembly, reducing the length of the automobile rear lid drive device and improving the acoustic performance of the transmission. In particular, the design of the worm gears with parallel helical angles further improves transmission efficiency and reduces resistance to manual reversal. The disclosed multi-plate coupling structure effectively improves the stability of the transmission system. The disclosed automobile rear lid drive device has the advantages of simple structure, low cost, compact layout, small luggage compartment space occupation, high transmission efficiency, smooth transmission, and good acoustic performance.

[0055] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0057] Those skilled in the art will appreciate that the above embodiments are merely intended to clearly illustrate the present disclosure and are not intended to limit the scope of the present disclosure. Other changes or modifications may be made based on the above disclosure, and such changes or modifications are still within the scope of the present disclosure.

[0058] Description of reference numerals:

[0059] 1′ motor

[0060] 2′ rocker arm

[0061] 3′ connecting rod

[0062] 4' rear cover hinge

[0063] 5′ back cover

[0064] 1 Automobile body side ball and socket assembly

[0065] 2 Gearbox assembly

[0066] 3 Motor assembly

[0067] 4 threaded rod assembly

[0068] 5 Threaded pipe assembly

[0069] 6 Spring

[0070] 7 Car rear cover hinge side ball and socket assembly

[0071] 8 screws

[0072] 9 screws

[0073] 10 Worm

[0074] 11 Worm gear

[0075] 12 threaded rod

[0076] 13 Limiting components

[0077] 14 Nut

[0078] 15 Nut tube

[0079] 16 First connecting component

[0080] 17 Second connecting component

[0081] 18 Third connecting component

[0082] 19 Nut tube recessed ring.

Claims

1. A car rear cover driving device, characterized in that: include: a gearbox assembly, a motor assembly, a threaded rod assembly, a nut tube assembly, a first ball and socket assembly, and a second ball and socket assembly; The gearbox assembly transmits the motion output by the motor assembly to the threaded rod assembly, causing the threaded rod assembly to rotate; The threaded rod assembly is connected to the nut tube assembly through threaded fitting; The rotation of the threaded rod assembly drives the nut tube assembly to rotate, so that the nut tube assembly reciprocates along the axial direction of the threaded rod assembly; The gearbox assembly includes a worm gear transmission mechanism that commutates the motion output by the motor assembly; The worm gear transmission mechanism includes a worm wheel and a worm, and the automobile rear cover drive device also includes a coupling, and the worm is connected to the motor assembly through the coupling; The coupling comprises a first coupling, a second coupling and a third coupling, wherein the second coupling is arranged between the first coupling and the third coupling, the first coupling and the third coupling are rigid components, and the second coupling is a non-rigid component, and the first coupling, the second coupling and the third coupling are all finger-shaped components, and the three couplings are staggered so that no relative displacement occurs among the three couplings along the circumference of the coupling; The first ball and socket assembly is fixedly connected to the gear box assembly, and the nut tube assembly is fixedly connected to the second ball and socket assembly; the first ball and socket assembly is a car body side ball and socket assembly, and the second ball and socket assembly is a car rear cover hinge side ball and socket assembly; the car body side ball and socket assembly is connected to the ball head of the car body through a ball socket, and the car rear cover hinge side ball and socket assembly is connected to the ball head of the car rear cover hinge through a ball socket.

2. The automobile rear cover driving device according to claim 1, characterized in that: It also includes a spring, which is sleeved on the outside of the threaded rod assembly and the nut tube assembly; the first end of the spring is fixedly connected to the first ball and socket assembly, and the second end of the spring is fixedly connected to the second ball and socket assembly.

3. The automobile rear cover driving device according to claim 1 or 2, characterized in that: The threaded rod assembly includes a threaded rod, and the nut tube assembly includes a nut and a nut tube, wherein the nut is fixed to the first end of the nut tube; the first end of the threaded rod is connected to the inner ring of the worm wheel of the worm gear transmission mechanism through a spline, and the threaded rod is connected to the nut of the nut tube assembly through threaded cooperation.

4. The automobile rear cover driving device according to claim 3, characterized in that: The second end of the threaded rod is provided with a limiting assembly, and a concave ring is formed on the circumference of the nut tube. The limiting assembly and the concave ring prevent the nut tube assembly from being disengaged from the threaded rod assembly.

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