A high-stability tailgate strut motor

Abstract

This invention relates to the field of motors, specifically to a high-stability tailgate strut motor. The self-testing mechanism includes a housing, a first rotating shaft, a second rotating shaft, an arc-shaped guide, and an arc-shaped moving component. The arc-shaped guide is fixedly installed within the housing. The arc-shaped moving component has an arc-shaped groove, within which the arc-shaped guide fits. The inner arc surface of the arc-shaped moving component has a first rack, the first rotating shaft has a first gear, and the second rotating shaft has a second gear. Both the first and second gears mesh with the inner arc surface of the arc-shaped moving component. One end of the arc-shaped groove has a clearance notch, formed by a recess in the groove wall near the first rotating shaft. The inner arc surface of the arc-shaped moving component has a protrusion, the protruding surface of which is arc-shaped and has a second rack. This mechanism enables self-testing without opening or closing the tailgate, facilitating the checking of the motor's response reliability and ensuring the motor's stability during normal operation.

Description

Technical Field

[0001] This invention relates to the field of electric motors, and more specifically, to a high-stability tailgate strut motor. Background Art

[0002] Currently, tailgate strut motors are widely used in electric vehicles. As tailgate safety becomes increasingly important, various automakers have introduced anti-pinch features for their tailgates.

[0003] In actual use, even if a car tailgate is equipped with an anti-pinch function, this function may malfunction over time, directly affecting safety, especially the safety of children. Therefore, it is necessary to regularly check the tailgate support motor to ensure it is functioning properly.

[0004] In existing technologies, the tailgate strut motor is typically inspected by repeatedly opening and closing the tailgate to observe its smoothness. This method accelerates wear and tear on the tailgate and related components, and only reflects the overall performance of the tailgate assembly, failing to assess the motor's true condition. Testing the motor's actual condition requires disassembling it, significantly increasing the workload.

[0005] In view of the above, this application is hereby submitted. Summary of the Invention

[0006] The purpose of this invention is to provide a highly stable tailgate strut motor that can perform self-testing without opening or closing the tailgate or removing the motor, facilitating the inspection of the motor's response reliability and ensuring the stability of the motor during normal operation.

[0007] The embodiments of the present invention are implemented as follows:

[0008] A high-stability tailgate strut motor includes: a motor body, a reduction mechanism, and a self-testing mechanism.

[0009] The motor body and the reduction gear mechanism are connected in a transmission manner.

[0010] The self-testing mechanism includes: housing, first rotating shaft, second rotating shaft, arc-shaped guide, and arc-shaped moving part.

[0011] Both the first and second rotating shafts are installed inside the housing. One end of the first rotating shaft extends outside the housing and is in transmission cooperation with the power output part of the reduction mechanism. One end of the second rotating shaft extends outside the housing and is used for transmission cooperation with the strut transmission component.

[0012] The arc-shaped guide is fixedly installed inside the housing. The arc-shaped moving part has an arc-shaped groove, and the arc-shaped guide fits into the arc-shaped groove. Along the length of the arc-shaped groove, the arc-shaped moving part and the arc-shaped guide slide in contact.

[0013] The inner arc surface of the arc-shaped moving part has a first rack, the first rotating shaft has a first gear, and the second rotating shaft has a second gear. Both the first gear and the second gear mesh with the inner arc surface of the arc-shaped moving part.

[0014] One end of the arc-shaped chute has a clearance notch, which is formed by a recess in the chute wall near the first rotating shaft. The opening length of the clearance notch on the chute wall is adapted to the length of the arc-shaped guide.

[0015] The inner arc surface of the arc-shaped moving part has a protrusion, the protruding surface of the protrusion is arc-shaped, and the protruding surface has a second toothed rack.

[0016] When the arc-shaped guide abuts against the end of the arc-shaped groove, the first gear simultaneously meshes with the first and second racks, and the arc-shaped guide fully enters the clearance notch. As the first gear continues to rotate, it drives the arc-shaped moving part to rotate through the second rack, while the arc-shaped guide remains abutting against the end of the arc-shaped groove, and the arc-shaped moving part separates from the second gear.

[0017] Furthermore, the width of the arc-shaped groove is adapted to the width of the arc-shaped guide.

[0018] Furthermore, the arc-shaped groove has a recessed end with a clearance notch, and the bottom wall of the recess is arc-shaped. The end of the arc-shaped guide has a mating part that fits into the recess. When the arc-shaped guide abuts against the end of the arc-shaped groove, the mating part engages within the recess. When the arc-shaped guide remains abutting against the end of the arc-shaped groove, and the arc-shaped moving part is driven by the first gear and disengaged from the second gear, the mating part rotates within the recess.

[0019] Furthermore, the inner wall on the side of the notch away from the groove is a guide wall. The guide wall is arc-shaped, and the central axis of the cylinder corresponding to the guide wall is set to coincide with the central axis of the cylinder corresponding to the bottom wall of the groove.

[0020] When the arc-shaped guide enters the clearance notch, the end of the arc-shaped guide away from the groove fits against the guide wall.

[0021] Furthermore, the end of the arc-shaped moving part with the clearance notch also has an inner cavity, which is spaced apart from the clearance notch.

[0022] A piston is slidably fitted within the inner cavity, and a sliding seal is formed between the piston and the inner wall of the cavity. A stopper rod is fixedly connected to the side of the piston near the relief notch, and the stopper rod extends into the relief notch. An abutment plate is fixedly connected to the end of the stopper rod away from the piston, and the abutment plate is located within the relief notch. A first elastic element abuts against the inner wall of the relief notch on the side of the inner cavity, so that in its natural state, the piston is in contact with the inner wall of the inner cavity on the side of the relief notch.

[0023] An oil hole is provided on the side of the piston away from the piston rod. The oil hole extends into the piston rod and further into the abutment plate. The oil hole penetrates the side of the abutment plate away from the piston rod.

[0024] The inner cavity is used to hold lubricating oil, and the arc-shaped moving part has a replenishment port for adding lubricating oil into the inner cavity.

[0025] When the arc-shaped guide enters the clearance notch, the arc-shaped guide abuts against the abutment plate and pushes the abutment plate, so that the lubricating oil in the inner cavity flows out through the oil hole and coats the arc-shaped guide.

[0026] Furthermore, a receiving groove is provided on the side surface of the abutment plate away from the plug rod, and oil-absorbing cotton is placed in the receiving groove, the thickness of which is greater than or equal to the depth of the receiving groove.

[0027] Furthermore, the oil-absorbing cotton also has an extension section in the middle.

[0028] The arc-shaped guide has a through hole. When the arc-shaped guide enters the clearance notch, the extension section passes through the through hole.

[0029] The diameter of the extension section is matched with the diameter of the through hole.

[0030] Furthermore, the diameter of the through hole is smaller than the thickness of the arc-shaped moving part. After the arc-shaped guide moves away from the clearance notch, both ends of the through hole are closed by the two side walls of the arc-shaped groove.

[0031] Furthermore, a buffer channel is provided at the end of the curved moving part with the clearance notch, and the buffer channel is located inside the curved moving part.

[0032] A connection hole is provided at the end of the inner cavity away from the plug rod, which connects the inner cavity to the buffer flow channel.

[0033] A buffer element is slidably fitted inside the buffer channel, and the buffer element slides and seals with the inner wall of the buffer channel. A second elastic element abuts between the side of the buffer element away from the connection hole and the end wall of the buffer channel away from the connection hole.

[0034] When the arc-shaped guide pushes the abutment plate, some of the lubricating oil in the inner cavity enters the buffer channel and pushes the buffer to prevent excessive lubricating oil from flowing out through the oil hole.

[0035] Furthermore, the self-testing mechanism includes: guide rails.

[0036] The guide rail includes a first rail body and a second rail body connected together, both of which are arc-shaped.

[0037] The curved moving part is fixedly connected to a mating block, which is slidably fitted to the guide rail.

[0038] When the arc-shaped moving part meshes with both the first and second gears simultaneously, the mating block is located on the first track. When the arc-shaped moving part disengages from the second gear, the mating block is located on the second track.

[0039] The beneficial effects of the technical solutions in the embodiments of the present invention include:

[0040] During operation, the device has both a working state and a testing state. When the motor body is actuated, it can drive the arc-shaped moving parts through the first rotating shaft, thereby realizing the switching between the two working states of the highly stable tailgate strut motor and realizing the specific actions in each working state.

[0041] In operation, under the limiting action of the arc-shaped guide, both the first gear and the second gear mesh with the first rack. Thus, when the first shaft actuates, the arc-shaped moving part moves relative to the arc-shaped guide, driving the second shaft and achieving power output, thereby successfully actuating the tailgate strut.

[0042] When the test begins, that is, when the arc-shaped guide abuts against the end of the arc-shaped groove, the first gear simultaneously meshes with the first rack and the second rack, and the arc-shaped guide completely enters the range of the clearance notch. In other words, the other end of the arc-shaped guide (the end away from the end wall of the arc-shaped groove) also enters the range of the clearance notch.

[0043] In the test state, even if the motor itself is activated, the second gear will not be driven. Therefore, in this state, the performance of the motor itself can be tested, including but not limited to testing the forward and reverse rotation sensitivity of the motor itself. During the test, the tailgate strut will not be driven, and the tailgate will not be opened and closed frequently. This not only facilitates the test but also reduces mechanical wear on tailgate-related components. Furthermore, the actual control sensitivity of the motor itself can be more accurately determined after the test, thus facilitating the evaluation of the motor's actual performance in the anti-pinch function. This ensures that the motor can smoothly execute the anti-pinch action, improving safety.

[0044] Furthermore, thanks to the above design, even if the motor body accidentally over-rotates (i.e., rotates too many times unexpectedly) when closing the tailgate, it will not cause damage to the tailgate and its related components, providing sufficient error buffer space for closing the tailgate and reducing the occurrence of additional mechanical wear.

[0045] The high-stability tailgate strut motor provided in this embodiment of the invention can perform self-testing without opening or closing the car tailgate or removing the motor, which facilitates checking the reliability of the motor's response and ensures the stability of the motor during normal operation. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A schematic diagram of the overall structure of the high-stability tailgate strut motor provided in an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the internal structure of the self-testing mechanism (in working condition).

[0049] Figure 3 This is a schematic diagram of the structure at the inner surface of the shell;

[0050] Figure 4 This is a schematic diagram of the internal structure of the self-testing mechanism (when it first enters the test state).

[0051] Figure 5 This is a schematic diagram of the mating of an arc-shaped moving part;

[0052] Figure 6 for Figure 5 A partial schematic diagram of the end of the arc-shaped moving part near the clearance notch;

[0053] Figure 7 This is a schematic diagram of the internal structure of the self-testing mechanism (test state).

[0054] Figure 8 A schematic diagram of the structure at the clearance notch of the curved moving part;

[0055] Figure 9 This is a schematic diagram of the internal structure of an arc-shaped moving part;

[0056] Figure 10 This is a partial schematic diagram of the inner cavity;

[0057] Figure 11 This is a schematic diagram of the arc-shaped guide pushing the abutment plate.

[0058] Explanation of reference numerals in the attached figures:

[0059] Motor body 100; reduction mechanism 200; self-testing mechanism 300; housing 310; first rotating shaft 320; first gear 321; second rotating shaft 330; second gear 331; arc-shaped guide 400; mating part 410; through hole 420; arc-shaped moving part 500; arc-shaped slide 510; groove 511; clearance notch 520; guide wall 521; protrusion 530; inner cavity 540; piston 541; piston rod 542; abutment plate 543; oil hole 544; oil-absorbing cotton 545; extension section 546; buffer flow channel 550; connecting hole 551; buffer 552; second elastic element 553; mating block 560; first rail body 610; second rail body 620. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0061] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0062] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0063] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0064] Furthermore, the terms "parallel" and "perpendicular" do not imply that components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be perfectly parallel, but that it can be slightly tilted.

[0065] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0066] To overcome the shortcomings of existing technologies, please refer to Figures 1-3 This embodiment provides a high-stability tailgate strut motor, which includes: a motor body 100, a reduction mechanism 200, and a self-testing mechanism 300.

[0067] The power output section of the motor body 100 is driven by the input end of the reduction mechanism 200.

[0068] The self-inspection mechanism 300 includes: a housing 310, a first rotating shaft 320, a second rotating shaft 330, an arc-shaped guide 400, and an arc-shaped moving part 500.

[0069] The first rotating shaft 320 and the second rotating shaft 330 are both installed inside the housing 310, wherein the first rotating shaft 320 and the second rotating shaft 330 are arranged in parallel and spaced apart.

[0070] One end of the first rotating shaft 320 passes through one side wall of the housing 310 and extends outside the housing 310. The outer end of the first rotating shaft 320 is in transmission cooperation with the power output part of the reduction mechanism 200.

[0071] One end of the second shaft 330 passes through the other side wall of the housing 310 and extends outside the housing 310. The outer end of the second shaft 330 is used for transmission engagement with the transmission components of the car tailgate strut.

[0072] In other words, the outer end of the second rotating shaft 330 serves as the final power output end of the high-stability tailgate strut motor.

[0073] The arc-shaped guide 400 is fixedly installed inside the housing 310. Specifically, the arc-shaped guide 400 is fixedly connected to the side wall of the housing 310.

[0074] The arc-shaped moving part 500 has an arc-shaped groove 510 extending along its length, and the arc-shaped guide 400 is fitted into the arc-shaped groove 510. Along the length of the arc-shaped groove 510, the arc-shaped moving part 500 and the arc-shaped guide 400 are in sliding engagement.

[0075] In this embodiment, the central axes of the cylinders corresponding to the arc-shaped guide 400, the arc-shaped moving part 500, and the arc-shaped slide 510 are aligned, and the central axes of the cylinders corresponding to the arc-shaped guide 400, the arc-shaped moving part 500, and the arc-shaped slide 510 are all parallel to the rotation axis of the first rotating shaft 320. The thickness of the arc-shaped guide 400 is adapted to the width of the arc-shaped slide 510.

[0076] The inner arc surface of the arc-shaped moving part 500 has a first rack (not shown in the figure), which extends along the length direction of the inner arc surface of the arc-shaped moving part 500.

[0077] A first rotating shaft 320 is coaxially and fixedly connected to a first gear 321, and a second rotating shaft 330 is coaxially and fixedly connected to a second gear 331. When the arc-shaped guide 400 is located in the area outside the clearance notch 520 within the arc-shaped slide groove 510, both the first gear 321 and the second gear 331 mesh with the inner arc surface of the arc-shaped moving member 500. The first gear 321 and the second gear 331 are spaced apart.

[0078] One end of the arc-shaped groove 510 has a clearance notch 520, which is located on the side of the first gear 321 away from the second gear 331. The clearance notch 520 is formed by a recess in the groove wall of the arc-shaped groove 510 near the first rotating shaft 320. Along the length of the arc-shaped groove 510, the opening length of the clearance notch 520 on the groove wall of the arc-shaped groove 510 is adapted to the length of the arc-shaped guide 400.

[0079] The inner arc surface of the arc-shaped moving part 500 also has a protrusion 530. The protrusion surface of the protrusion 530 is arc-shaped. The central axis of the cylinder corresponding to the protrusion surface of the protrusion 530 is arranged parallel to the rotation axis of the first rotating shaft 320. The protrusion surface has a second rack (not shown in the figure) extending along its length direction.

[0080] The high-stability tailgate strut motor has both a working state and a testing state during operation. When the motor body 100 is actuated, it can drive the arc-shaped moving part 500 through the first rotating shaft 320, thereby realizing the switching between the two working states of the high-stability tailgate strut motor and realizing the specific actions in each working state.

[0081] Specifically, when the high-stability tailgate strut motor is in operation, its operation smoothly controls the tailgate strut's movement, thus smoothly controlling the opening and closing of the tailgate. In this state, during the movement of the arc-shaped moving part 500, the arc-shaped guide part 400 remains outside the clearance notch 520 within the arc-shaped slide groove 510. In other words, in operation, the arc-shaped guide part 400 will not enter the clearance notch 520 area; it will only move outside the clearance notch 520 area within the arc-shaped slide groove 510.

[0082] In the working state, under the limiting action of the arc-shaped guide 400, both the first gear 321 and the second gear 331 mesh with the first rack. In this way, when the first rotating shaft 320 is actuated, the second rotating shaft 330 can be driven by the movement of the arc-shaped moving part 500 relative to the arc-shaped guide 400, thereby realizing the output of power and thus enabling the tailgate strut to be actuated successfully.

[0083] In this embodiment, during the movement of the arc-shaped moving member 500 relative to the arc-shaped guide member 400, as the gap between the arc-shaped guide member 400 and the clearance notch 520 gradually decreases, the high-stability tailgate strut motor drives the tailgate to close. As the gap between the arc-shaped guide member 400 and the clearance notch 520 gradually increases, the high-stability tailgate strut motor drives the tailgate to open. When the end wall of the arc-shaped guide member 400 near the clearance notch 520 just reaches the edge of the opening of the clearance notch 520, the tailgate is completely closed.

[0084] During the movement of the arc-shaped moving component 500 relative to the arc-shaped guide component 400, when the end of the arc-shaped guide component 400 near the clearance notch 520 enters the range of the clearance notch 520, the high-stability tailgate strut motor switches from the working state to the testing state. When the end of the arc-shaped guide component 400 abuts against the end of the arc-shaped slide groove 510 with the clearance notch 520, the high-stability tailgate strut motor successfully enters the testing state. Figures 4-6 As shown.

[0085] When the test is initiated, that is, when the arc-shaped guide 400 abuts against the end of the arc-shaped groove 510, the first gear 321 simultaneously meshes with the first rack and the second rack, and the arc-shaped guide 400 completely enters the range of the clearance notch 520. In other words, the other end of the arc-shaped guide 400 (the end away from the end wall of the arc-shaped groove 510) also enters the range of the clearance notch 520.

[0086] At this time, as the first gear 321 continues to rotate in the direction indicated by the arrow in Path 4, the first gear 321 drives the arc-shaped moving part 500 to rotate through the second rack. The arc-shaped guide 400 remains abutting against the end of the arc-shaped slide groove 510. The first gear 321 remains engaged with the second rack. The arc-shaped moving part 500 rotates around the end of the arc-shaped guide 400 that abuts against it as a reference point. The arc-shaped moving part 500 separates from the second gear 331, as... Figure 7 As shown.

[0087] In the test state, even if the motor body 100 is activated, the second gear 331 will not be driven. Therefore, in this state, the performance of the motor body 100 can be tested, including but not limited to testing the forward and reverse rotation sensitivity of the motor body 100. During the test, the tailgate support rod will not be driven, and the tailgate will not be opened and closed frequently. This not only facilitates the test but also reduces mechanical wear on tailgate-related components. Furthermore, the actual control sensitivity of the motor body 100 can be more accurately determined after the test, thus facilitating the evaluation of the actual performance of the motor body 100 in the anti-pinch function. This ensures that the motor body 100 can smoothly perform the anti-pinch action, improving safety.

[0088] Furthermore, thanks to the above design, even if the motor body 100 accidentally over-rotates (i.e., rotates too many times) when closing the tailgate, it will not cause damage to the tailgate and its related components, providing sufficient error buffer space for closing the tailgate and reducing the occurrence of additional mechanical losses.

[0089] On the other hand, the high-stability tailgate strut motor provided in this embodiment allows for performance testing of the motor body 100 without opening or closing the tailgate or removing the motor. For example, the forward and reverse rotation response sensitivity of the motor body 100 can be tested during testing. This significantly improves the convenience of testing. When the motor body 100 has good forward and reverse rotation response sensitivity, it can better perform the anti-pinch function of the tailgate.

[0090] Meanwhile, if testing shows that the motor body 100 has good forward and reverse rotation response sensitivity, but the overall anti-pinch function of the tailgate is poor, it indicates that it is necessary to focus on checking related components other than the motor body 100. In other words, the high-stability tailgate strut motor can also help locate and troubleshoot faulty areas with poor anti-pinch function performance.

[0091] Overall, the high-stability tailgate strut motor provided in this embodiment can perform self-tests without opening or closing the car tailgate or removing the motor, which facilitates checking the reliability of the motor's response and ensures the stability of the motor during normal operation.

[0092] In this embodiment, the arc-shaped groove 510 has a recess 511 at one end where a clearance notch 520 is provided, such as... Figure 8 As shown, the bottom wall of the groove 511 is arc-shaped, and the central axis of the cylinder corresponding to the bottom wall of the groove 511 is set parallel to the rotation axis of the first rotating shaft 320.

[0093] The end of the arc-shaped guide 400 has a mating portion 410 that is adapted to the groove 511. When the arc-shaped guide 400 abuts against the end of the arc-shaped groove 510, the mating portion 410 fits into the groove 511. When the arc-shaped guide 400 remains abutting against the end of the arc-shaped groove 510, and the arc-shaped moving member 500 is driven by the first gear 321 and disengaged from the second gear 331, the mating portion 410 rotates within the groove 511. When the arc-shaped moving member 500 rotates relative to the arc-shaped guide 400, the rotation axis of the arc-shaped moving member 500 is parallel to the rotation axis of the first rotating shaft 320.

[0094] This design improves the stability of the arc-shaped moving part 500 when rotating relative to the arc-shaped guide part 400.

[0095] In this embodiment, the inner wall of the clearance notch 520 away from the groove 511 is a guide wall 521. The guide wall 521 is arc-shaped, and the central axis of the cylinder corresponding to the guide wall 521 is coincident with the central axis of the cylinder corresponding to the bottom wall of the groove 511. That is to say, the cylinder corresponding to the guide wall 521 and the cylinder corresponding to the bottom wall of the groove 511 are coaxially arranged.

[0096] When the arc-shaped moving part 500 rotates relative to the arc-shaped guide part 400, that is, when the arc-shaped guide part 400 moves into the interior of the clearance notch 520, the end wall of the arc-shaped guide part 400 away from the groove 511 fits against the guide wall 521.

[0097] To ensure smooth movement of the curved moving part 500 relative to the curved guide part 400 during operation, please combine... Figures 9-11 The arc-shaped moving part 500 has an inner cavity 540 at one end with a clearance notch 520, and the inner cavity 540 and the clearance notch 520 are spaced apart.

[0098] A piston 541 is fitted in the inner cavity 540. Along the length of the inner cavity 540, the piston 541 is slidably fitted in the inner cavity 540, and the piston 541 and the inner wall of the inner cavity 540 are slidably sealed.

[0099] A piston rod 542 is fixedly connected to the side of piston 541 near the relief notch 520. The piston rod 542 passes through the relief notch 520. An abutment plate 543 is fixedly connected to the end of piston 542 away from piston 541. The abutment plate 543 is located inside the relief notch 520.

[0100] A first elastic element (not shown in the figure) abuts between the abutting plate 543 and the inner wall of the relief notch 520 near the inner cavity 540, so that in the natural state, the piston 541 fits against the inner wall of the inner cavity 540 near the relief notch 520.

[0101] Both the inner cavity 540 and the plug rod 542 are arc-shaped, and the central axis of the corresponding circumference of the inner cavity 540 and the plug rod 542 is set to coincide with the central axis of the corresponding circumference of the bottom wall of the groove 511.

[0102] An oil hole 544 is provided on the side surface of the piston 541 away from the piston rod 542. The oil hole 544 extends into the piston rod 542 and further extends to the abutment plate 543. The oil hole 544 penetrates to the side surface of the abutment plate 543 away from the piston rod 542.

[0103] The inner cavity 540 is used to contain lubricating oil, and the arc-shaped moving part 500 has a replenishment port (not shown) for replenishing lubricating oil into the inner cavity 540. It is understood that the replenishment port is provided with a sealing element (not shown) for closing the replenishment port, and the sealing element and the replenishment port are detachably engaged.

[0104] When the arc-shaped moving part 500 rotates relative to the arc-shaped guide 400, the arc-shaped guide 400 enters the clearance notch 520, and the arc-shaped guide 400 can abut against and push the abutment plate 543, thereby causing the piston 541 to squeeze the lubricating oil in the inner cavity 540, so that the lubricating oil in the inner cavity 540 flows out through the oil hole 544 and coats the surface of the arc-shaped guide 400.

[0105] Through this design, while testing the motor body 100 in the test state, lubricating oil is also added to the surface of the arc-shaped guide 400 to make the relative movement between the arc-shaped moving part 500 and the arc-shaped guide 400 smoother in the subsequent working state and reduce mechanical wear.

[0106] The abutment plate 543 has a receiving groove on the side surface away from the stopper rod 542, and the oil hole 544 extends to the bottom wall of the receiving groove and communicates with the receiving groove. The receiving groove contains oil-absorbing cotton 545, the thickness of which is greater than or equal to the depth of the receiving groove. Optionally, the thickness of the oil-absorbing cotton 545 is slightly greater than the depth of the receiving groove.

[0107] This design utilizes the oil-absorbing cotton 545 to more effectively promote the spread of lubricating oil on the surface of the arc-shaped guide 400, resulting in a more uniform lubricating oil coating. Furthermore, when the arc-shaped guide 400 moves relative to the opening of the relief notch 520, under the elastic force of the first elastic member, the abutment plate 543 remains in contact with the arc-shaped guide 400 and can absorb excess lubricating oil from the surface of the arc-shaped guide 400, preventing over-coating and reducing lubricating oil waste.

[0108] Furthermore, the middle part of the oil-absorbing cotton 545 also has an extension section 546.

[0109] The arc-shaped guide 400 has a through hole 420. When the arc-shaped guide 400 enters the clearance notch 520, the extension section 546 passes through the arc-shaped guide 400 through the through hole 420.

[0110] The diameter of the extension 546 is adapted to the diameter of the through hole 420. Optionally, the outer diameter of the end of the extension 546 gradually decreases so that the extension 546 can be smoothly inserted into the through hole 420.

[0111] This design allows for the easy application of lubricant to the side of the curved guide 400 away from the abutment plate 543.

[0112] In this embodiment, the diameter of the through hole 420 is smaller than the thickness of the arc-shaped moving part 500. When the arc-shaped guide 400 leaves the clearance notch 520, that is, when it is in the working state, the two ends of the through hole 420 are respectively closed by the two side walls of the arc-shaped groove 510.

[0113] With this design, the through hole 420 can also serve as a medium for balancing the lubricating oil on both sides of the arc-shaped slide 510. If there is a lot of lubricating oil in a certain area of ​​the slide wall, the excess lubricating oil can be "scraped off" by the edge of the through hole 420 and enter the through hole 420. The lubricating oil in the through hole 420 can supplement the lubrication of other parts of the slide wall, thereby improving the uniformity of the lubricating oil on the slide wall of the arc-shaped slide 510 and balancing the lubricating oil on both sides of the slide wall.

[0114] Furthermore, the end of the arc-shaped moving part 500 with the clearance notch 520 is also provided with a buffer channel 550, which is located inside the arc-shaped moving part 500.

[0115] A connection hole 551 is provided at the end of the inner cavity 540 away from the plug rod 542, and the connection hole 551 connects the inner cavity 540 to the buffer flow channel 550.

[0116] A buffer member 552 is slidably fitted inside the buffer channel 550. The buffer member 552 slides and seals with the inner wall of the buffer channel 550. A second elastic member 553 abuts between the side of the buffer member 552 away from the connecting hole 551 and the end wall of the buffer channel 550 away from the connecting hole 551.

[0117] When the arc-shaped guide 400 pushes the abutment plate 543, a portion of the lubricating oil in the inner cavity 540 enters the buffer flow channel 550 and pushes the buffer 552 to prevent excessive lubricating oil from flowing out through the oil hole 544.

[0118] This design avoids applying excessive amounts of lubricating oil to the arc-shaped guide 400 in a single application. Lubricating oil entering the buffer channel 550 can return to the inner cavity 540 under the action of the second elastic element 553, facilitating the next application of lubricating oil to the guide.

[0119] It should be noted that the actual buffering capacity of the buffer channel 550 can be adjusted by adjusting the elastic coefficient of the second elastic element 553.

[0120] In addition, the position where the arc-shaped guide 400 and the abutment plate 543 fit together can be changed by adjusting the length of the stop rod 542. That is, the distance that the arc-shaped guide 400 needs to move into the clearance notch 520 to fit together with the abutment plate 543 can be controlled. In this way, the degree to which the motor body 100 needs to rotate can be controlled to trigger the lubricating oil coating mechanism.

[0121] Optionally, a pressure sensor (not shown in the figure) can be provided at the end of the second elastic member 553 away from the buffer member 552, that is, the second elastic member 553 abuts against the buffer member 552 and the pressure sensor. In this way, the amount of lubricant entering the buffer flow channel 550 can be determined based on the pressure data detected by the pressure sensor, thereby helping to determine whether there is sufficient lubricating oil in the inner cavity 540. Generally, when the rotation degree of the motor body 100 is the same, the greater the pressure detected by the pressure sensor, the greater the amount of lubricant entering the buffer flow channel 550, which in turn indicates that there is sufficient lubricating oil in the inner cavity 540. This can be used as a reference for not adding lubricating oil to the inner cavity 540.

[0122] Furthermore, the self-inspection mechanism 300 includes: guide rails.

[0123] The guide rail includes a first rail body 610 and a second rail body 620 connected together, both of which are arc-shaped.

[0124] The arc-shaped moving part 500 is fixedly connected to a mating block 560, which is slidably fitted to the guide rail.

[0125] When in operation, the arc-shaped moving part 500 engages simultaneously with the first gear 321 and the second gear 331, and the mating block 560 is located on the first track 610. When in testing mode, the arc-shaped moving part 500 disengages from the second gear 331, and the mating block 560 is located on the second track 620.

[0126] This design further improves the motion stability of the arc-shaped moving part 500. Furthermore, the test load on the motor body 100 during testing can be controlled by adjusting the sliding resistance between the mating block 560 and the second rail 620.

[0127] It is understood that the specific operation of the high-stability tailgate strut motor in the working state, the specific operation of the high-stability tailgate strut motor in the testing state, and the switching between the high-stability tailgate strut motor in the working state and the testing state can all be uniformly completed by the controller (not shown in the figure), which will not be elaborated in this application.

[0128] In summary, the high-stability tailgate strut motor provided in this embodiment of the invention can perform self-testing without opening or closing the car tailgate or removing the motor, which facilitates the inspection of the motor's response reliability and ensures the stability of the motor during normal operation.

[0129] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-stability tailgate strut motor, characterized in that, include: Motor body, reduction gear mechanism and self-testing mechanism; The motor body is in transmission cooperation with the reduction mechanism; The self-testing mechanism includes: a housing, a first rotating shaft, a second rotating shaft, an arc-shaped guide, and an arc-shaped moving component; Both the first rotating shaft and the second rotating shaft are installed inside the housing. One end of the first rotating shaft extends through the outside of the housing and is in transmission cooperation with the power output part of the reduction mechanism. One end of the second rotating shaft extends through the outside of the housing and is used for transmission cooperation with the strut transmission component. The arc-shaped guide is fixedly installed inside the housing; the arc-shaped moving part has an arc-shaped groove, and the arc-shaped guide fits into the arc-shaped groove; along the length direction of the arc-shaped groove, the arc-shaped moving part and the arc-shaped guide slide together. The inner arc surface of the arc-shaped moving part has a first rack, the first rotating shaft has a first gear, and the second rotating shaft has a second gear. Both the first gear and the second gear mesh with the inner arc surface of the arc-shaped moving part. One end of the arc-shaped slide has a clearance notch, which is formed by a recess in the side wall of the arc-shaped slide near the first rotating shaft; the opening length of the clearance notch on the side wall of the arc-shaped slide is adapted to the length of the arc-shaped guide. The inner arc surface of the arc-shaped moving part has a protrusion, the protruding surface of the protrusion is arc-shaped, and the protruding surface has a second toothed rack; When the arc-shaped guide abuts against the end of the arc-shaped groove, the first gear simultaneously meshes with the first rack and the second rack, and the arc-shaped guide fully enters the range of the clearance notch; when the first gear continues to rotate, the first gear drives the arc-shaped moving part to rotate through the second rack, the arc-shaped guide remains abutting against the end of the arc-shaped groove, and the arc-shaped moving part separates from the second gear.

2. The high-stability tailgate strut motor according to claim 1, characterized in that, The width of the arc-shaped groove is adapted to the width of the arc-shaped guide.

3. The high-stability tailgate strut motor according to claim 1, characterized in that, The arc-shaped groove has a groove at one end where the clearance notch is provided, and the bottom wall of the groove is arc-shaped. The end of the arc-shaped guide has a mating part that matches the groove. When the arc-shaped guide abuts against the end of the arc-shaped groove, the mating part engages in the groove. When the arc-shaped guide remains abutting against the end of the arc-shaped groove, and the arc-shaped moving part is driven by the first gear and separated from the second gear, the mating part rotates within the groove.

4. The high-stability tailgate strut motor according to claim 3, characterized in that, The inner wall of the clearance notch away from the groove is a guide wall. The guide wall is arc-shaped, and the central axis of the cylinder corresponding to the guide wall coincides with the central axis of the cylinder corresponding to the bottom wall of the groove. When the arc-shaped guide enters the clearance notch, the end of the arc-shaped guide away from the groove fits against the guide wall.

5. The high-stability tailgate strut motor according to claim 1, characterized in that, The arc-shaped moving part has an inner cavity at one end where the clearance notch is provided, and the inner cavity is spaced apart from the clearance notch. A piston is slidably fitted within the inner cavity, and the piston and the inner wall of the inner cavity are slidably sealed. A stopper rod is fixedly connected to the side of the piston near the relief notch, and the stopper rod extends into the relief notch. An abutment plate is fixedly connected to the end of the stopper rod away from the piston, and the abutment plate is located within the relief notch. A first elastic element abuts against the inner wall of the relief notch near the inner cavity, so that in its natural state, the piston fits against the inner wall of the inner cavity near the relief notch. An oil hole is provided on the side surface of the piston away from the piston rod. The oil hole extends into the piston rod and further extends into the abutment plate. The oil hole penetrates the side surface of the abutment plate away from the piston rod. The inner cavity is used to contain lubricating oil, and the arc-shaped moving part has a filling port for replenishing lubricating oil into the inner cavity; When the arc-shaped guide enters the clearance notch, the arc-shaped guide abuts against the abutment plate and pushes the abutment plate, so that the lubricating oil in the inner cavity flows out through the oil hole and coats the arc-shaped guide.

6. The high-stability tailgate strut motor according to claim 5, characterized in that, The abutment plate has a receiving groove on the side surface away from the plug rod, and the receiving groove contains oil-absorbing cotton, the thickness of which is greater than or equal to the depth of the receiving groove.

7. The high-stability tailgate strut motor according to claim 6, characterized in that, The oil-absorbing cotton also has an extension section in the middle; The arc-shaped guide has a through hole. When the arc-shaped guide enters the clearance notch, the extension section passes through the through hole. The diameter of the extension section is adapted to the diameter of the through hole.

8. The high-stability tailgate strut motor according to claim 7, characterized in that, The diameter of the through hole is smaller than the thickness of the arc-shaped moving part. When the arc-shaped guide moves away from the clearance notch, both ends of the through hole are closed by the two side walls of the arc-shaped groove.

9. The high-stability tailgate strut motor according to claim 5, characterized in that, The arc-shaped moving part is provided with a buffer channel at one end where the clearance notch is provided, and the buffer channel is located inside the arc-shaped moving part; A connecting hole is provided at one end of the inner cavity away from the plug rod, and the connecting hole connects the inner cavity to the buffer flow channel; A buffer element is slidably fitted inside the buffer channel. The buffer element is slidably sealed to the inner wall of the buffer channel. A second elastic element abuts between the side of the buffer element away from the connecting hole and the end wall of the buffer channel away from the connecting hole. When the arc-shaped guide pushes the abutment plate, a portion of the lubricating oil in the inner cavity enters the buffer channel and pushes the buffer to prevent excessive lubricating oil from flowing out through the oil hole.

10. The high-stability tailgate strut motor according to claim 1, characterized in that, The self-testing mechanism includes: a guide rail; The guide rail includes a first rail body and a second rail body connected together, both of which are arc-shaped. The arc-shaped moving part is fixedly connected to a mating block, and the mating block is slidably fitted to the guide rail; When the arc-shaped moving part meshes with both the first gear and the second gear simultaneously, the mating block is located on the first track; when the arc-shaped moving part separates from the second gear, the mating block is located on the second track.

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