Electric supporting rod device and vehicle

Abstract

The utility model discloses an electric supporting rod device and a vehicle. The electric supporting rod device comprises an outer pipe, a first ball socket connector, a motor assembly, a lead screw assembly, a damping bearing, a nut pipe pushing assembly, an inner pipe and a second ball socket connector, the first ball socket connector is fixed to one end of the outer pipe, and the motor assembly is arranged in the end, close to the first ball socket connector, of the outer pipe; the lead screw assembly is arranged in the outer pipe and is in driving connection with the motor assembly, the damping bearing is arranged in the outer pipe and arranged at the end, close to the motor assembly, of the lead screw assembly in a sleeving mode, the nut pipe pushing assembly is in threaded connection with the lead screw assembly, at least part of the structure of the inner pipe is arranged in the outer pipe, and the inner pipe can stretch out and draw back relative to the outer pipe. The second ball socket connector is fixed to the end, away from the first ball socket connector, of the inner pipe. The end, away from the motor assembly, of the nut push pipe assembly is fixed to the second ball socket connector. In this way, the fixed length of the electric supporting rod device is short, the adjustable stroke is long, and therefore the adaptability of the electric supporting rod device is improved, inventory is reduced, and repeated development is avoided.

Description

Technical Field

[0001] This application relates to the field of automotive parts, and particularly to an electric strut device and a vehicle. Background Art

[0002] With the development of the intelligentization and comfort of the opening and closing of the automobile tailgate, the electric strut device has been widely used on the automobile tailgate due to its advantages of compact structure and stable performance. In the existing electric strut device, the damper and the bearing are two independent parts, resulting in a long fixed length and a short adjustable stroke of the electric strut device, and problems such as poor adaptability, high inventory, and high repeated development cost. Summary of the Utility Model

[0003] An electric strut device and a vehicle provided by this application can solve the problems of the long fixed length and short adjustable stroke of the electric strut device in the prior art, resulting in poor adaptability, high inventory, and high repeated development cost.

[0004] To solve the above technical problems, a technical solution adopted by this application is: to provide an electric strut device, the electric strut device includes: an outer tube; a first ball socket connector fixed to one end of the outer tube; a motor assembly disposed inside the outer tube near the first ball socket connector; a lead screw assembly disposed inside the outer tube and drivingly connected to the motor assembly; a damping bearing disposed inside the outer tube and sleeved on one end of the lead screw assembly near the motor assembly; a nut push tube assembly screwed to the lead screw assembly; an inner tube, at least part of the structure is disposed inside the outer tube, and the inner tube can telescopically move relative to the outer tube; a second ball socket connector fixed to one end of the inner tube away from the first ball socket connector; wherein, one end of the nut push tube assembly away from the motor assembly is fixed to the second ball socket connector.

[0005] In one embodiment, the outer tube includes a connected first pipe section, a second pipe section, and an inner edge connected between the first pipe section and the second pipe section. The first ball socket connector is fixed to one end of the first pipe section away from the inner edge. The motor assembly is disposed between the inner edge and the first ball socket connector, and the motor assembly is closer to the first ball socket connector relative to the inner edge. The damping bearing is disposed between the inner edge and the motor assembly. The lead screw assembly passes through the inner edge, and the length of the lead screw assembly located in the second pipe section is greater than the length located in the first pipe section.

[0006] In one embodiment, the number of the damping bearings is 1.

[0007] In one embodiment, the screw assembly includes a screw and a buffer member fixed to one end of the screw facing away from the motor assembly, the screw includes a spline section, a first shaft section, a second shaft section and a threaded section connected in sequence, the spline section is drivingly connected to the motor assembly, the damping bearing is sleeved on the first shaft section, the nut push tube assembly is threadedly connected to the threaded section, and the electric strut device also includes a sealing member, the sealing member is provided with a through hole, the hole wall of the through hole is provided with a plurality of first sealing rings, the sealing member is sleeved on the second shaft section through the through hole, and the first sealing ring abuts against the second shaft section.

[0008] In one embodiment, the electric support rod device also includes a guide member, the guide member includes a connected guide tube and a mounting seat, the mounting seat is connected to the guide tube, the outer tube includes a connected first tube segment, a second tube segment and an inner edge connected between the first tube segment and the second tube segment, the guide member is inserted into the outer tube from the end of the first tube segment away from the inner edge, the guide tube passes through the inner edge and enters the second tube segment, the mounting seat abuts against the inner edge, the mounting seat is located in the first tube segment, the seal and the damping bearing are installed on the mounting seat, the screw rod is passed through the guide member, and at least part of the structure of the inner tube is sleeved on the guide tube.

[0009] In one embodiment, the first shaft segment and the second shaft segment are located in the mounting seat, and the threaded segment is located in the guide tube.

[0010] In one embodiment, the seal includes a main body and a first annular groove, the main body is funnel-shaped, the first annular groove is connected to the periphery of one end of the main body facing the damping bearing, the mounting seat is provided with a second annular groove, the first annular groove and the second annular groove are staggered and plugged together, so that the seal is installed on the mounting seat.

[0011] In one embodiment, the second annular groove is a high-low-side annular groove, the end surface of the high side of the second annular groove is flush with the bottom surface of the first annular groove, and the electric support rod device also includes a gasket, which is arranged in the mounting seat and abuts against the end surface of the high side of the second annular groove and the bottom surface of the first annular groove.

[0012] In one embodiment, a second sealing ring is disposed on the bottom surface of the first annular groove, and the second sealing ring abuts against the gasket.

[0013] In one embodiment, both the outer ring and the inner ring of the damping bearing are abutted against the gasket. The electric strut device further includes a covering seat disposed in the first pipe section. A receiving groove is provided on a side of the covering seat facing the damping bearing. The groove wall of the receiving groove is fitted with the seat wall of the mounting seat, such that the outer ring of the damping bearing is abutted between the gasket and the bottom of the receiving groove, and the motor assembly is located between the covering seat and the first ball socket connector.

[0014] In one embodiment, the damping bearing includes an inner ring, an outer ring, and a nano shock-absorbing structure connected between the inner ring and the outer ring, wherein the nano shock-absorbing structure provides damping for the relative rotation of the inner ring with respect to the outer ring.

[0015] In one embodiment, the damping bearing includes an inner ring, an outer ring, and a damping seal connected between the inner ring and the outer ring. One of the inner ring and the outer ring is provided with a raised block, and the raised block is provided with a threaded hole. The damping seal is screwed to the threaded hole through a fastener, such that the damping seal is fastened to the raised block.

[0016] Another technical solution adopted in this application is: to provide a vehicle, which includes the electric strut device as described in any one of the above.

[0017] The beneficial effects of this application are as follows: Different from the prior art, the electric strut device provided in this application includes: an outer tube; a first ball socket connector fixed to one end of the outer tube; a motor assembly disposed inside the outer tube near the first ball socket connector; a lead screw assembly disposed inside the outer tube and drivingly connected to the motor assembly; a damping bearing disposed inside the outer tube and sleeved on one end of the lead screw assembly close to the motor assembly; a nut push tube assembly screwed to the lead screw assembly; an inner tube, at least part of the structure of which is disposed inside the outer tube, and the inner tube can telescopically move relative to the outer tube; a second ball socket connector fixed to one end of the inner tube facing away from the first ball socket connector; wherein, one end of the nut push tube assembly away from the motor assembly is fixed to the second ball socket connector. In this way, the fixed length of the electric strut device is short, and the adjustable stroke is long, thereby improving the adaptability of the electric strut device, reducing inventory, and avoiding repeated development. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a schematic structural view of an electric strut device provided by some embodiments of the present application;

[0020] Figure 2 is Figure 1 a cross-sectional view of the electric strut device at A-A;

[0021] Figure 3 is Figure 2 a partially enlarged view of the electric strut device in area M;

[0022] Figure 4 is an exploded schematic view of an electric strut device provided by some embodiments of the present application;

[0023] Figure 5 is a broken view of an outer tube provided by some embodiments of the present application;

[0024] Figure 6 is a schematic structural view of a cover seat provided by some embodiments of the present application;

[0025] Figure 7 is a broken view of a lead screw assembly provided by some embodiments of the present application;

[0026] Figure 8 is a cross-sectional view of a seal provided by some embodiments of the present application;

[0027] Figure 9 is a schematic structural view of a guide provided by some embodiments of the present application;

[0028] Figure 10 is a schematic structural view of a damping bearing provided by some embodiments of the present application;

[0029] Figure 11 is a schematic structural view of a damping bearing provided by other some embodiments of the present application;

[0030] Figure 12 is a schematic structural view of a vehicle provided by some embodiments of the present application.

[0031] Description of Reference Numerals: 2000 - Electric strut device, 100 - Outer tube, 110 - First pipe section, 120 - Second pipe section, 130 - Inner edge, 200 - First ball socket connector, 300 - Motor assembly, 400 - Lead screw assembly, 410 - Lead screw, 411 - Spline section, 412 - First shaft section, 413 - Second shaft section, 414 - Thread section, 420 - Buffer, 500 - Damping bearing, 510 - Inner ring, 520 - Outer ring, 530 - Nano damping structure, 540 - Damping seal, 550 - Protruding block, 551 - Threaded hole, 600 - Nut push tube assembly, 700 - Inner tube, 800 - Second ball socket connector, 900 - Seal, 910 - Through hole, 911 - First sealing ring, 920 - Main body, 930 - First annular groove, 940 - Second sealing ring, 1000 - Guide, 1010 - Guide tube, 1020 - Mounting seat, 1021 - Second annular groove, 1100 - Gasket, 1200 - Cover seat, 1210 - Receiving groove, 3000 - Vehicle. Detailed Embodiment

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of description, only the parts related to the present application rather than all the structures are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0033] The terms "first", "second", and "third" in the present application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0034] Reference to "embodiment" in this document means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0035] The electric strut device provided by the present application includes: an outer tube; a first ball socket connector fixed to one end of the outer tube; a motor assembly disposed inside the outer tube near the first ball socket connector; a lead screw assembly disposed inside the outer tube and drivingly connected to the motor assembly; a damping bearing disposed inside the outer tube and sleeved on one end of the lead screw assembly near the motor assembly; a nut push tube assembly screwed to the lead screw assembly; an inner tube, at least part of the structure of which is disposed inside the outer tube, and the inner tube can telescopically move relative to the outer tube; a second ball socket connector fixed to one end of the inner tube away from the first ball socket connector; wherein, one end of the nut push tube assembly away from the motor assembly is fixed to the second ball socket connector. In this way, the fixed length of the electric strut device is short and the adjustable stroke is long, thereby improving the adaptability of the electric strut device, reducing inventory, and avoiding repeated development.

[0036] An electric strut device is an automated actuator integrating parts such as a motor, a friction plate type damper, a bearing, a lead screw, and a nut, and is mainly used to achieve linear motion control of mechanical equipment. The electric strut device drives the lead screw to rotate through the motor, and then pushes the nut to move axially along the lead screw to achieve the telescopic movement of the electric strut device. Among them, the bearing is sleeved on the optical axis of the lead screw to provide a supporting effect and bear the radial load, so that the lead screw moves smoothly. Among them, the friction plate type damper is connected to the spline section of the lead screw to provide damping for the rotation of the lead screw, thereby preventing the electric strut device that bears a load and is in a hovering state from accidentally retracting. In particular, when the electric strut device is applied to realize the opening and closing of the electric tailgate of a vehicle, the accidental closing of the tailgate in the hovering open state may bring great safety hazards. Therefore, it is necessary to provide a certain amount of damping to the lead screw in the electric strut device. However, due to the relatively long length of the friction plate type damper, when the friction plate type damper and the bearing are assembled as two independent parts in the electric strut device, the fixed length of the electric strut device is long and the adjustable stroke is short, making it difficult to adapt to various different vehicle models, resulting in poor adaptability, high inventory, and high repeated development cost of the electric strut device.

[0037] Please refer to Figure 12 , Figure 12It is a schematic structural diagram of a vehicle provided by some embodiments of the present application. The vehicle 3000 provided by the present application can achieve electric opening, closing, and hovering of the tailgate. The vehicle 3000 may include, but is not limited to, an electric strut device 2000. One end of the electric strut device 2000 is hinged to the body of the vehicle 3000, and the other end of the electric strut device 2000 is hinged to the tailgate of the vehicle 3000, so as to drive the tailgate to open relative to the body when extending and drive the tailgate to close relative to the body when retracting. Further, the electric strut device 2000 can achieve hovering of the tailgate during the process of driving the tailgate to open or close, effectively supporting the weight of the tailgate and avoiding safety accidents caused by accidental closing of the tailgate. Specifically, the user can control the opening, closing, and hovering of the tailgate through an in-vehicle button and / or a remote control key. Different vehicle models have different spaces for arranging the electric strut device and different requirements for the opening angle of the tailgate, so for different vehicle models, different models of electric strut devices often need to be developed to correspond to them, resulting in high repeated development costs and high inventory. The electric strut device 2000 adopted in the vehicle 3000 has a short fixed length and a long adjustable stroke, and can adapt to as many vehicle models as possible, thereby reducing inventory and avoiding repeated development.

[0038] Please refer to Figures 1 - 5 , Figure 1 which is a schematic structural diagram of an electric strut device provided by some embodiments of the present application, Figure 2 is Figure 1 a sectional view of the electric strut device at A-A, Figure 3 is Figure 2 a partial enlarged view of the electric strut device in area M, Figure 4 which is an exploded schematic diagram of an electric strut device provided by some embodiments of the present application, Figure 5It is a fracture view of the outer tube provided by some embodiments of the present application. The electric strut device 2000 provided by the present application has a short fixed length and a long adjustable stroke, and can adapt to as many vehicle models as possible, thereby reducing inventory and avoiding repeated development. The electric strut device 2000 may include, but is not limited to, an outer tube 100, a first ball socket connector 200, a motor assembly 300, a lead screw assembly 400, a damping bearing 500, a nut push tube assembly 600, an inner tube 700, and a second ball socket connector 800. The first ball socket connector 200 is fixed to one end of the outer tube 100 to be ball-hinged to one of the vehicle body and the tailgate. The motor assembly 300 is disposed inside the outer tube 100 near the first ball socket connector 200 to minimize the fixed length of the electric strut device 2000, thereby ensuring a longer adjustable stroke. Among them, the motor assembly 300 serves as the power source of the electric strut device 2000. The lead screw assembly 400 is disposed inside the outer tube 100 and is drivingly connected to the motor assembly 300 to be driven to rotate by the motor assembly 300. The damping bearing 500 is disposed inside the outer tube 100 and sleeved on one end of the lead screw assembly 400 near the motor assembly 300 to minimize the fixed length of the electric strut device 2000, thereby ensuring a longer adjustable stroke. Among them, the damping bearing 500 can provide rotational damping to the lead screw assembly 400, and at the same time play a role in supporting the lead screw assembly 400 and bearing the radial load of the lead screw assembly 400. The nut push tube assembly 600 is screwed to the lead screw assembly 400 to convert the rotational motion of the lead screw assembly 400 into a linear motion of the nut push tube assembly 600. At least part of the structure of the inner tube 700 is disposed inside the outer tube 100. One end of the nut push tube assembly 600 away from the motor assembly 300 is fixed to the second ball socket connector 800, and the second ball socket connector 800 is fixed to one end of the inner tube 700 facing away from the first ball socket connector 200, thereby realizing the telescopic movement of the inner tube 700 relative to the outer tube 100.

[0039] It can be understood that when the electric strut device is applied to the electric tailgate system of a vehicle, in order to realize the hovering function of the electric tailgate, a damper needs to be added to the electric strut device. In the prior art, a friction plate type damper is disposed between the motor assembly and the bearing, and the friction plate type damper is in spline fit with the lead screw assembly, so as to provide rotational damping to the lead screw assembly to realize the hovering of the electric tailgate. In the present application, the rotational damping is provided to the lead screw assembly 400 through the damping bearing 500 to realize the hovering of the electric tailgate. The damping bearing 500 serves both as a bearing and as a damper. Compared with the electric strut device with both a bearing and a friction plate type damper installed, the electric strut device 2000 with the damping bearing 500 provided by the present application can achieve a shorter fixed length and a longer adjustable stroke, so as to be able to adapt to as many vehicle models as possible, thereby reducing inventory and avoiding repeated development.

[0040] In this embodiment, the number of damping bearings 500 is 1 to minimize the fixed length of the electric strut device 2000 as much as possible, thereby ensuring a longer adjustable stroke. In some other embodiments, the number of damping bearings 500 can be 2 or more.

[0041] Further, the outer tube 100 may include, but is not limited to, a first tube section 110, a second tube section 120, and an inner edge 130. The inner edge 130 is connected between the first tube section 110 and the second tube section 120. The first ball socket connector 200 is fixed to one end of the first tube section 110 away from the inner edge 130, and the motor assembly 300 is disposed between the inner edge 130 and the first ball socket connector 200. The motor assembly 300 is closer to the first ball socket connector 200 relative to the inner edge 130. The damping bearing 500 is disposed between the inner edge 130 and the motor assembly 300. The lead screw assembly 400 passes through the inner edge 130, and the length of the lead screw assembly 400 located in the second tube section 120 is greater than the length located in the first tube section 110. Among them, the length of the lead screw assembly 400 located in the second tube section 120 determines the size of the adjustable stroke. Generally speaking, the longer the second tube section 120 is, the longer the length that the second tube section 120 can accommodate the lead screw assembly 400 is, and thus the larger the adjustable stroke of the electric strut device 2000 is. In this embodiment, the fixed length of the electric strut device 2000 can be understood as the distance between the first ball socket connector 200 and the inner edge 130. The adjustable stroke of the electric strut device 2000 can be understood as the distance difference between the electric strut device 2000 in the fully extended state and the electric strut device 2000 in the fully retracted state. Generally, the adjustable stroke of the electric strut device 2000 is less than but slightly equal to the length of the second tube section 120.

[0042] Please refer to Figure 10 , Figure 10 which is a schematic structural diagram of a damping bearing provided in some embodiments of the present application. In some embodiments, the damping bearing 500 may include, but is not limited to, an inner ring 510, an outer ring 520, and a nano shock-absorbing structure 530. The nano shock-absorbing structure 530 is connected between the inner ring 510 and the outer ring 520. Among them, the nano shock-absorbing structure 530 provides the damping for the relative rotation of the inner ring 510 with respect to the outer ring 520.

[0043] It can be understood that the nano shock-absorbing structure 530 is made of nano-porous material. The nano shock-absorbing structure 530 has excellent shock-absorbing performance. In addition to providing the damping for the relative rotation of the inner ring 510 with respect to the outer ring 520, it can also play a shock-absorbing and buffering role when bearing the radial load of the lead screw assembly 400, making the lead screw assembly 400 rotate more quietly and smoothly.

[0044] Please refer to Figure 11 , Figure 11is a schematic diagram of the structure of the damping bearing provided in other embodiments of the present application. In other embodiments, the damping bearing 500 may include but is not limited to an inner ring 510, an outer ring 520 and a damping seal 540. The damping seal 540 is connected between the inner ring 510 and the outer ring 520. One of the inner ring 510 and the outer ring 520 is provided with a protruding block 550. The protruding block 550 is provided with a threaded hole 551. The damping seal 540 is screwed with the threaded hole 551 through a fastener, so that the damping seal 540 is fastened to the protruding block 550. In this embodiment, the protruding block 550 is arranged on the outer ring 520. In some other embodiments, the protruding block 550 can be arranged on the inner ring 510.

[0045] It can be understood that the damping seal 540 is an elastic deformation structure. By adjusting the threaded connection process between the fastener and the threaded hole 551, the damping seal 540 is deformed, thereby changing the contact area between the damping seal 540 and the outer ring 520 and / or the inner ring 510, and then changing the rotation damping of the inner ring 510 relative to the outer ring 520.

[0046] Please refer to Figures 2 - 9 , Figure 6 is a schematic diagram of the structure of the cover seat provided in some embodiments of the present application, Figure 7 is a fracture view of a screw rod assembly provided in some embodiments of the present application, Figure 8 is a cross-sectional view of a seal provided in some embodiments of the present application, Figure 9 4 is a schematic diagram of the structure of the guide member provided in some embodiments of the present application. The screw assembly 400 may include but is not limited to a screw 410 and a buffer 420. The buffer 420 is fixed to the end of the screw 410 away from the motor assembly 300 to provide a limit and buffering effect on the nut in the nut push tube assembly 600. The screw 410 includes a spline section 411, a first shaft section 412, a second shaft section 413 and a threaded section 414 connected in sequence. The spline section 411 is driven and connected to the motor assembly 300 so that the screw assembly 400 can be driven to rotate. Among them, the spline 411 can provide good torque transmission capability, avoid power loss and slippage, and make power transmission more efficient and accurate. The damping bearing 500 is sleeved on the first shaft section 412 to provide rotational damping and support for the screw assembly 400, and at the same time can withstand the radial load generated when the screw assembly 400 rotates. The nut push tube assembly 600 is threadedly connected to the threaded section 414 to convert the rotational motion of the screw assembly 400 into the linear motion of the nut push tube assembly 600 .

[0047] Further, the electric strut device 2000 further includes a seal 900. The seal 900 may include, but is not limited to, a main body portion 920 and a first annular groove 930. The first annular groove 930 is connected to the periphery of one end of the main body portion 920 facing the damping bearing 500. In this embodiment, the main body portion 920 is funnel-shaped. The seal 900 is further provided with a through hole 910. A plurality of first sealing rings 911 are provided on the hole wall of the through hole 910. The seal 900 is sleeved on the second shaft section 413 through the through hole 910, and the first sealing ring 911 abuts against the second shaft section 413 to provide rotational damping for the lead screw assembly 400 and at the same time play a role in waterproofing and dustproofing. Among them, the through hole 910 penetrates through the main body portion 920.

[0048] Further, the electric strut device 2000 further includes a guide member 1000. The guide member 1000 may include, but is not limited to, a connected guide tube 1010 and a mounting seat 1020. The mounting seat 1020 communicates with the guide tube 1010. The guide member 1000 is inserted into the outer tube 100 from one end of the first tube section 110 of the outer tube 100 facing away from the inner edge 130, and the guide tube 1010 passes through the inner edge 130 and enters the second tube section 120. The mounting seat 1020 abuts against the inner edge 130 to provide a mounting and fixing basis for the seal 900 and the damping bearing 500. The mounting seat 1020 is located in the first tube section 110. The seal 900 and the damping bearing 500 are mounted on the mounting seat 1020. The lead screw 410 passes through the guide member 1000. Specifically, the first shaft section 412 and the second shaft section 413 are located in the mounting seat 1020, and the threaded section 414 is located in the guide tube 1010. At least part of the structure of the inner tube 700 is sleeved on the guide tube 1010.

[0049] In some embodiments, a helical spring is further provided between the guide tube 1010 and the inner tube 700. The guide tube 1010 can provide a guiding function for the telescopic movement of the helical spring, and at the same time separate the helical spring from the lead screw assembly 400, thereby avoiding the possibility that the helical spring may interfere with the linear reciprocating movement of the nut push rod assembly 600.

[0050] Further, the mounting seat 1020 is provided with a second annular groove 1021. The first annular groove 930 and the second annular groove 1021 are inserted in a staggered manner, so that the seal 900 is mounted on the mounting seat 1020. The way of inserting the annular grooves in a staggered manner, on the one hand, facilitates the positioning and installation of the seal 900, and on the other hand, also plays a role in sealing and dustproofing and waterproofing. Specifically, the second annular groove 1021 is a high-low edge annular groove. The end face of the high edge of the second annular groove 1021 is flush with the bottom surface of the first annular groove 930.

[0051] Further, the electric strut further includes a gasket 1100. The gasket 1100 is disposed in the mounting seat 1020 and abuts against the end face of the high side of the second annular groove 1021 and the bottom surface of the first annular groove 930. The outer ring 520 and the inner ring 510 of the damping bearing 500 both abut against the gasket 1100, such that when the inner ring 510 rotates relative to the outer ring 529, friction occurs between the inner ring 510 and the gasket 1100. That is, the frictional effect between the gasket 1100 and the inner ring 510 further enhances the rotational damping of the lead screw assembly 400.

[0052] In this embodiment, a second sealing ring 940 is provided on the bottom surface of the first annular groove 930. The second sealing ring abuts against the gasket 1100, such that the sealing performance of the electric strut device 2000 is further enhanced.

[0053] Further, the electric strut device 2000 further includes a covering seat 1200. The covering seat 1200 is disposed in the first pipe section 110. A receiving groove 1210 is provided on one side of the covering seat 1200 facing the damping bearing 500. The groove wall of the receiving groove 1210 is mutually engaged with the seat wall of the mounting seat 1020, such that the outer ring 520 of the damping bearing 500 abuts between the gasket 1100 and the bottom of the receiving groove 1210, thereby fixing the outer ring 520 of the damping bearing 500 and enabling the lead screw assembly 400 and the inner ring 510 to rotate relative to the outer ring 520. Among them, the motor assembly 300 is located between the covering seat 1200 and the first ball socket connector 200.

[0054] The electric strut device 2000 provided by the present application includes: an outer tube 100; a first ball socket connector 200 fixed to one end of the outer tube 100; a motor assembly 300 disposed in the outer tube 100 near one end of the first ball socket connector 200; a lead screw assembly 400 disposed in the outer tube 100 and drivingly connected to the motor assembly 300; a damping bearing 500 disposed in the outer tube 100 and sleeved on one end of the lead screw assembly 400 near the motor assembly 300; a nut push tube assembly 600 screwed to the lead screw assembly 400; an inner tube 700 at least partially disposed in the outer tube 100, and the inner tube 700 can telescopically move relative to the outer tube 100; a second ball socket connector 800 fixed to one end of the inner tube 100 facing away from the first ball socket connector 200; wherein, one end of the nut push tube assembly 600 away from the motor assembly 300 is fixed to the second ball socket connector 800. In this way, the fixed length of the electric strut device 2000 is short and the adjustable stroke is long, thereby improving the adaptability of the electric strut device 2000, reducing inventory and avoiding repeated development.

[0055] The above are only partial embodiments of the present application, and thus do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. An electric support rod device, characterized in that: include: External pipe; A first ball-and-socket connector, fixed to one end of the outer tube; A motor assembly is disposed in one end of the outer tube close to the first ball-and-socket connector; A screw assembly is disposed in the outer tube and is drivingly connected to the motor assembly; A damping bearing is disposed in the outer tube and sleeved on one end of the screw assembly close to the motor assembly; A nut push tube assembly, threadedly connected to the screw rod assembly; An inner tube, at least part of which is disposed inside the outer tube, and the inner tube is capable of expansion and contraction relative to the outer tube; a second ball-and-socket connector, fixed to an end of the inner tube away from the first ball-and-socket connector; Wherein, one end of the nut push tube assembly away from the motor assembly is fixed to the second ball and socket connector.

2. The electric strut device according to claim 1, characterized in that: The outer tube includes a first tube section, a second tube section and an inner edge connected between the first tube section and the second tube section, the first ball socket connector is fixed to an end of the first tube section away from the inner edge, the motor assembly is arranged between the inner edge and the first ball socket connector, and the motor assembly is closer to the first ball socket connector relative to the inner edge, the damping bearing is arranged between the inner edge and the motor assembly, the screw assembly passes through the inner edge, and the length of the screw assembly located in the second tube section is greater than the length located in the first tube section.

3. The electric strut device according to claim 2, characterized in that: The number of the damping bearing is 1.

4. The electric strut device according to claim 1, characterized in that: The screw assembly includes a screw and a buffer member fixed to one end of the screw facing away from the motor assembly, the screw includes a spline section, a first shaft section, a second shaft section and a threaded section connected in sequence, the spline section is drivingly connected to the motor assembly, the damping bearing is sleeved on the first shaft section, the nut push tube assembly is threadedly connected to the threaded section, the electric strut device also includes a sealing member, the sealing member is provided with a through hole, the hole wall of the through hole is provided with a plurality of first sealing rings, the sealing member is sleeved on the second shaft section through the through hole, and the first sealing ring abuts against the second shaft section.

5. The electric strut device according to claim 4, characterized in that: The electric strut device also includes a guide member, which includes a connected guide tube and a mounting seat, the mounting seat is connected to the guide tube, the outer tube includes a connected first tube section, a second tube section and an inner edge connected between the first tube section and the second tube section, the guide member is inserted into the outer tube from the end of the first tube section away from the inner edge, the guide tube passes through the inner edge and enters the second tube section, the mounting seat abuts against the inner edge, the mounting seat is located in the first tube section, the seal and the damping bearing are installed on the mounting seat, the screw rod is passed through the guide member, and at least part of the structure of the inner tube is sleeved on the guide tube.

6. The electric strut device according to claim 5, characterized in that: The first shaft section and the second shaft section are located in the mounting seat, and the threaded section is located in the guide tube.

7. The electric strut device according to claim 5, characterized in that: The seal includes a main body and a first annular groove, the main body is funnel-shaped, the first annular groove is connected to the periphery of one end of the main body facing the damping bearing, the mounting seat is provided with a second annular groove, the first annular groove and the second annular groove are staggered and plugged together, so that the seal is installed on the mounting seat.

8. The electric strut device according to claim 7, characterized in that: The second annular groove is a high-low-side annular groove, the end surface of the high side of the second annular groove is flush with the bottom surface of the first annular groove, and the electric support rod device also includes a gasket, which is arranged in the mounting seat and abuts against the end surface of the high side of the second annular groove and the bottom surface of the first annular groove.

9. The electric strut device according to claim 8, characterized in that: A second sealing ring is disposed on the bottom surface of the first annular groove, and the second sealing ring abuts against the gasket.

10. The electric strut device according to claim 8, characterized in that: The outer ring and the inner ring of the damping bearing are both in contact with the gasket, and the electric strut device also includes a cover seat, which is arranged in the first pipe section. The cover seat is provided with a receiving groove on the side facing the damping bearing, and the groove wall of the receiving groove and the seat wall of the mounting seat are mutually embedded, so that the outer ring of the damping bearing is in contact between the gasket and the bottom of the receiving groove, and the motor assembly is located between the cover seat and the first ball and socket connector.

11. The electric strut device according to claim 1, characterized in that: The damping bearing comprises an inner ring, an outer ring and a nano-vibration-absorbing structure connected between the inner ring and the outer ring, wherein the nano-vibration-absorbing structure provides damping for the inner ring to rotate relative to the outer ring.

12. The electric strut device according to claim 1, characterized in that: The damping bearing includes an inner ring, an outer ring and a damping seal connected between the inner ring and the outer ring. One of the inner ring and the outer ring is provided with a protruding block, and the protruding block is provided with a threaded hole. The damping seal is screwed to the threaded hole through a fastener, so that the damping seal is fastened to the protruding block.

13. A vehicle, characterized in that: It comprises an electric strut device as described in any one of claims 1-12.

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