A kind of automobile electric tailgate support rod

Abstract

The present invention provides a car electric tailgate support rod, comprising: a first telescopic rod group, the first telescopic rod group comprising a first telescopic rod, a first driving member, a second driving member and a threaded rod, the first telescopic rod can be switched between an extended position and a retracted position relative to the second telescopic rod group; a limit assembly, the limit assembly comprising a first limit slip ring and a second limit slip ring, the first limit slip ring and the second limit slip ring are both provided with a positive pressure oil chamber and a negative pressure oil chamber; when the first telescopic rod switches between the extended position and the retracted position, one of the first limit slip ring and the second limit slip ring can apply oil to a part of the limit posts among a plurality of limit posts through the positive pressure oil chamber, and the other of the first limit slip ring and the second limit slip ring can absorb oil from another part of the limit posts among the plurality of limit posts through the negative pressure oil chamber. The present application can ensure the smoothness of the sliding connection between the limit assembly and the limit post, so that the first telescopic rod can be effectively and smoothly switched between the extended position and the retracted position.

Description

Technical Field

[0001] The invention relates to the technical field of devices for moving a wing leaf to an open or closed position, and in particular to a support rod for an electric tailgate of an automobile. Background Art

[0002] In the related art, the support rod of the electric tailgate of a car includes a first telescopic rod, a second telescopic rod, a screw and a slider, and the slider is slidably connected to the first telescopic rod. The screw rotates to separate the first telescopic rod and the second telescopic rod through the slider, so as to meet the use requirement of the electric tailgate support rod of the car to switch to the extended state. When the slider in the electric tailgate support rod of the car is stationary for a long time, the lubricating oil between the slider and the first telescopic rod will deteriorate due to temperature changes, oxidation and other factors, reducing the lubricating effect of the lubricating oil. At the same time, the lubricating oil may settle or accumulate in certain parts of the electric tailgate support rod of the car when it is stationary for a long time. The above factors will cause uneven lubrication when the slider moves for the first time, which is prone to jamming and cannot meet the use requirement of smooth operation of the slider. Summary of the invention

[0003] Based on this, it is necessary to provide an electric tailgate support rod for an automobile to solve the problem that the slider of the current electric tailgate support rod for an automobile does not run smoothly when it moves for the first time after being stationary for a long time.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A car electric tailgate support rod comprises: a first telescopic rod group, the first telescopic rod group comprises a first telescopic rod, a first driving member, a second driving member and a threaded rod, a plurality of limit posts arranged at intervals along the circumference of the threaded rod are arranged in the first telescopic rod, each limit post extends along the axial direction of the threaded rod, the first driving member and the second driving member are both arranged in the first telescopic rod, the first end of the threaded rod is connected to the first driving member, and the first driving member is used to drive the threaded rod to rotate; a second telescopic rod group, the first telescopic rod group is slidably connected to the second telescopic rod group, the second end of the threaded rod is connected to the second telescopic rod group, and the first telescopic rod can switch between an extended position and a retracted position relative to the second telescopic rod group; a limit assembly is sleeved on the threaded rod, and the limit assembly is slidably connected to the plurality of limit posts, the limit assembly is located between the first driving member and the second telescopic rod group, the limit assembly comprises a first limit slip ring and a second limit slip ring, the first limit slip ring and the second limit slip ring are arranged along the axial direction of the threaded rod, and the first limit slip ring and the second limit slip ring are both provided with a positive pressure oil chamber and a negative pressure oil chamber. The oil pressure chamber, the positive pressure oil chamber and the negative pressure oil chamber are all connected to the limit column; the reset spring; the second driving member is used to drive the limit assembly to work, so that the limit assembly cooperates with the threaded rod through one of the first limit slip ring and the second limit slip ring; the threaded rod rotates along the first direction to drive the limit assembly to move in the direction away from the first driving member through the first limit slip ring or the second limit slip ring that cooperates with the threaded rod, so that the first telescopic rod is separated from the second telescopic rod group and moves to the extended position; the threaded rod rotates along the second direction to drive the limit assembly to move toward the first driving member through the first limit slip ring or the second limit slip ring that cooperates with the threaded rod, and the reset spring drives the first telescopic rod to reset to the retracted position; wherein, when the first telescopic rod switches between the extended position and the retracted position, one of the first limit slip ring and the second limit slip ring can apply oil to a part of the limit columns among the multiple limit columns through the positive pressure oil chamber, and the other of the first limit slip ring and the second limit slip ring can absorb oil from another part of the limit columns among the multiple limit columns through the negative pressure oil chamber.

[0006] In one of the embodiments, the first limit slip ring and the second limit slip ring both include: a ring body, the ring body is provided with a positive pressure oil chamber and a negative pressure oil chamber; a sliding limit column, which is slidably connected to the ring body. When the second driving member drives the limit assembly to work, the sliding limit column of one of the first limit slip ring and the second limit slip ring is abutted against the spiral groove of the threaded rod, and the sliding limit column of the other of the first limit slip ring and the second limit slip ring is separated from the threaded rod.

[0007] In one of the embodiments, the number of the limit posts is N, and the N limit posts are arranged at intervals along the circumference of the threaded rod; the outer circumferential wall of the ring body of the first limit slip ring is provided with N / 2 grooves and N / 2 avoidance grooves, and the outer circumferential wall of the ring body of the second limit slip ring is provided with N / 2 grooves and N / 2 avoidance grooves, each groove is slidably connected to a limit post, each groove of the first limit slip ring is arranged opposite to an avoidance groove of the second limit slip ring, and the avoidance groove is used to avoid the limit post; in the ring body, the positive pressure oil chamber and the negative pressure oil chamber are both connected to the groove; wherein, N≥2×n, n is a positive integer.

[0008] In one embodiment, the limit assembly also includes: a limit sleeve, which is sleeved on the threaded rod, and the limit sleeve is slidably connected to the threaded rod, the first limit slip ring and the second limit slip ring are both sleeved on the limit sleeve, the limit sleeve is provided with a guide bevel, the guide bevel passes through the outer wall and the inner wall of the limit sleeve, and the sliding limit column is connected to the guide bevel; wherein the second driving member is used to drive the limit sleeve to rotate, and the guide bevel is used to drive the sliding limit column to move relative to the ring body when the limit sleeve rotates.

[0009] In one embodiment, the first driving member includes a first motor and a planetary reducer, and the first motor is connected to the threaded rod through the planetary reducer; a helical gear is provided at the end of the limiting sleeve away from the first driving member, and the second driving member includes a second motor, and the output end of the second motor is meshed with the helical gear.

[0010] In one embodiment, a plurality of limiting posts are arranged at equal intervals along the circumference of the threaded rod.

[0011] In one embodiment, the number of the first limiting slip ring is at least one, and the number of the second limiting slip ring is at least one; when the number of the first limiting slip ring and the number of the second limiting slip ring are both multiple, the multiple first limiting slip rings are located on the same side of the multiple second limiting slip rings, or at least one second limiting slip ring is arranged between any two adjacent first limiting slip rings.

[0012] In one of the embodiments, the first limit slip ring and the second limit slip ring are also provided with a first one-way valve and a second one-way valve, the first one-way valve is connected to the positive pressure oil chamber, and the second one-way valve is connected to the negative pressure oil chamber, and the first telescopic rod group also includes: a lubricating oil assembly, which is connected to the threaded rod, and the lubricating oil assembly is located between the limit assembly and the first driving member. The oil outlet pipe of the lubricating oil assembly is detachably connected to the first one-way valve, and the oil suction pipe of the lubricating oil assembly is detachably connected to the second one-way valve.

[0013] In one embodiment, air bags are provided in both the positive pressure oil chamber and the negative pressure oil chamber.

[0014] In one embodiment, the second telescopic rod group includes: a second telescopic rod; a top rod, the second telescopic rod is arranged around the top rod, the top rod is provided with a matching groove, and the second end of the threaded rod is connected to the matching groove; the first telescopic rod group also includes a limit rod, the limit rod is connected to the first telescopic rod, the limit rod is arranged around the threaded rod, and the inner surface of the limit rod is provided with a limit column; when the first telescopic rod is in the retracted position, the top rod is located between the threaded rod and the limit rod, the reset spring is located between the limit rod and the second telescopic rod, and the reset spring is in contact with the first telescopic rod group.

[0015] The automobile electric tailgate support rod of the present invention comprises a first telescopic rod group, a second telescopic rod group, a limit assembly and a return spring.

[0016] The first telescopic rod group includes a first telescopic rod, a first driving member, a second driving member, a limiting column and a threaded rod.

[0017] The first telescopic rod group is slidably connected to the second telescopic rod group.

[0018] The limiting assembly is sleeved on the threaded rod, and the limiting assembly comprises a first limiting slip ring and a second limiting slip ring.

[0019] The first telescopic rod can switch between the extended position and the retracted position relative to the second telescopic rod group. Specifically, take the first limit slip ring and the threaded rod as an example. The second driving member drives the limit assembly to work so that the first limit slip ring cooperates with the threaded rod. The first driving member drives the threaded rod to rotate along the first direction, so as to drive the limit assembly to move in the direction away from the first driving member through the first limit slip ring that cooperates with the threaded rod, so that the first telescopic rod is separated from the second telescopic rod group and moves to the extended position. At the same time, the second limit slip ring that is not matched with the threaded rod will also move in the direction away from the first driving member. The first driving member drives the threaded rod to rotate along the second direction, so as to drive the limit assembly to move toward the first driving member through the first limit slip ring that cooperates with the threaded rod. Under the action of the reset spring of the electric tailgate support rod of the automobile, the first telescopic rod moves to the retracted position relative to the second telescopic rod group. At the same time, the second limit slip ring that is not matched with the threaded rod will also move in the direction of the first driving member.

[0020] Furthermore, a plurality of limit posts are provided in the first telescopic rod, and the plurality of limit posts are arranged at intervals along the circumference of the threaded rod, and each limit post extends along the axial direction of the threaded rod. The limit assembly is slidably connected to the limit post, and the limit assembly is movably connected to the threaded rod. The limit assembly includes a first limit slip ring and a second limit slip ring. The first limit slip ring is provided with a positive pressure oil chamber and a negative pressure oil chamber, the positive pressure oil chamber is connected to the limit post, and the negative pressure oil chamber is connected to the limit post. The second limit slip ring is provided with a positive pressure oil chamber and a negative pressure oil chamber, the positive pressure oil chamber is connected to the limit post, and the negative pressure oil chamber is connected to the limit post.

[0021] When the first telescopic rod switches between the extended position and the retracted position, one of the first limit slip ring and the second limit slip ring can apply oil to a part of the limit posts among the multiple limit posts through the positive pressure oil chamber, and the other of the first limit slip ring and the second limit slip ring can absorb oil from another part of the limit posts among the multiple limit posts through the negative pressure oil chamber. That is, the positive pressure oil chamber of the first limit slip ring can apply oil to the limit post, and the negative pressure oil chamber of the second limit slip ring can absorb oil from the limit post. Or the positive pressure oil chamber of the second limit slip ring can apply oil to the limit post, and the negative pressure oil chamber of the first limit slip ring can absorb oil from the limit post.

[0022] When the frequency of use of the electric tailgate support rod of the automobile is high, oil is applied to a part of the plurality of limit posts through the positive pressure oil chamber of one of the first limit slip ring and the second limit slip ring, and another part of the plurality of limit posts is in an unoiled state. In other words, only a part of the plurality of limit posts is in an oiled state, and the limit posts coated with lubricating oil have the function of slidingly cooperating with the limit assembly to guide the limit assembly, so as to meet the use requirements of the first telescopic rod switching between the extended position and the retracted position.

[0023] Whether the other of the first limiting slip ring and the second limiting slip ring absorbs oil from the limiting column depends on whether the lubricating oil on the limiting column is deteriorated.

[0024] When the support rod of the electric tailgate of the automobile has not been used for a long time, the position of the first telescopic rod can be switched (i.e., the extended position and the retracted position) and combined with the working mode of the second driving member, so that one of the first limiting slip ring and the second limiting slip ring can suck the waste oil from the limiting column coated with the waste oil, and the other of the first limiting slip ring and the second limiting slip ring can apply oil to the limiting column not coated with the lubricating oil.

[0025] Take the example of four limit posts. The four limit posts are respectively recorded as the first limit post, the second limit post, the third limit post and the fourth limit post, and the first limit post and the fourth limit post are coated with lubricating oil. When the electric tailgate support rod of the automobile has not been used for a long time, the positive pressure oil chamber of the first limit slip ring can be switched to apply oil to the second limit post and the third limit post by switching the position of the first telescopic rod (i.e., the extended position and the retracted position) and combining the working mode of the second driving member, and the negative pressure oil chamber of the second limit slip ring can absorb oil from the first limit post and the fourth limit post to absorb the waste oil at the first limit post and the fourth limit post. At this time, the limit posts that cooperate with the limit assembly are switched from the first limit post and the fourth limit post to the second limit post and the third limit post.

[0026] In this way, the lubricating oil at the limit column of the guide limit assembly is always in a normal use state, which can avoid the situation where the limit assembly is stuck at a certain place of the limit column due to poor lubrication effect caused by the deterioration of the lubricating oil. The smoothness of the sliding connection between the limit assembly and the limit column can be ensured, so that the first telescopic rod can effectively and smoothly switch between the extended position and the retracted position. This setting enables the limit assembly to not only provide structural support for the first telescopic rod to switch between the extended position and the retracted position, but also has the function of coating and replacing new lubricating oil on the limit column, enriching the function of the limit assembly and improving the performance of the product.

[0027] It can be understood that the second driving member is used to drive the limiting assembly to work so that one of the first limiting slip ring and the second limiting slip ring cooperates with the threaded rod. That is, the first limiting slip ring or the second limiting slip ring that cooperates with the threaded rod is a force-bearing member, and the second limiting slip ring or the first limiting slip ring that does not cooperate with the threaded rod is a non-force-bearing member. Therefore, the working time of the first limiting slip ring and the second limiting slip ring can be balanced by switching the force-bearing member, which is conducive to extending the service life of the first limiting slip ring and the second limiting slip ring, and further helps to reduce the frequency of repair and maintenance of the electric tailgate support rod of the automobile. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a first-viewing angle of a vehicle electric tailgate support rod according to an embodiment of the present invention;

[0029] Figure 2 A schematic structural diagram of a second viewing angle of a vehicle electric tailgate support rod according to an embodiment of the present invention;

[0030] Figure 3 It is a schematic structural diagram of the first part of the electric tailgate support rod of an automobile according to an embodiment of the present invention;

[0031] Figure 4 It is a schematic structural diagram of the second part of the electric tailgate support rod of an automobile according to an embodiment of the present invention;

[0032] Figure 5 It is a schematic structural diagram of a limiting assembly and a limiting column from a first viewing angle according to an embodiment of the present invention;

[0033] Figure 6 A schematic structural diagram of a limiting assembly and a limiting column from a second viewing angle according to an embodiment of the present invention;

[0034] Figure 7 It is a schematic diagram of the first part of the structure of the limiting assembly and the limiting column according to one embodiment of the present invention;

[0035] Figure 8 It is a schematic diagram of the second part of the structure of the limiting assembly and the limiting column according to one embodiment of the present invention;

[0036] Fig. 9 for Figure 8 A partial enlarged view of the position A of the limit assembly and the limit column shown;

[0037] Fig.10 It is a structural schematic diagram of a first limiting slip ring according to an embodiment of the present invention;

[0038] Fig.11 The diagram is a structural diagram of a lubricating oil assembly, a positive pressure oil chamber and a negative pressure oil chamber according to an embodiment of the present invention.

[0039] Among them: 10 automobile electric tailgate support rod, 100 first telescopic rod group, 110 first telescopic rod, 120 first driving member, 122 first motor, 124 planetary reducer, 130 second driving member, 140 threaded rod, 150 limit column, 1501 first limit column, 1502 second limit column, 1503 third limit column, 1504 fourth limit column, 160 lubricating oil assembly, 170 limit rod, 200 second telescopic rod group, 210 second telescopic rod, 220 push rod, 222 matching groove, 300 Limiting assembly, 310 first limiting slip ring, 320 second limiting slip ring, 330 ring body, 332 positive pressure oil chamber, 334 negative pressure oil chamber, 340 sliding limiting column, 350 groove, 360 avoidance groove, 370 limiting sleeve, 372 guiding inclined groove, 374 bevel gear, 380 first one-way valve, 390 second one-way valve, 400 airbag, 410 liquid inlet, 420 liquid outlet, 430 ball, 500 reset spring, 600 fixing block, 700 control cable, 800 connecting gap, 900 extended gap. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] Refer to the following Figures 1 to 11 The following describes an automotive electric tailgate support rod 10 according to some embodiments of the present application.

[0044] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, according to some embodiments of the present application, an electric tailgate support rod 10 for an automobile comprises: a first telescopic rod group 100, the first telescopic rod group 100 comprises a first telescopic rod 110, a first driving member 120, a second driving member 130 and a threaded rod 140, a plurality of limiting posts 150 arranged at intervals along the circumference of the threaded rod 140 are arranged in the first telescopic rod 110, each limiting post 150 extends along the axial direction of the threaded rod 140, the first driving member 120 and the second driving member 130 are both arranged in the first telescopic rod 110, a first end of the threaded rod 140 is connected to the first driving member 120, and the first driving member 120 is used to drive the threaded rod 140 to rotate; a second telescopic rod group 200, the first telescopic rod group 100 comprises a first telescopic rod 110, a first driving member 120, a second driving member 130 and a threaded rod 140, a plurality of limiting posts 150 arranged at intervals along the circumference of the threaded rod 140 are arranged in the first telescopic rod 110, each limiting post 150 extends along the axial direction of the threaded rod 140, the first driving member 120 and the second driving member 130 are both arranged in the first telescopic rod 110, a first end of the threaded rod 140 is connected to the first driving member 120, and the first driving member 120 is used to drive the threaded rod 140 to rotate; The rod group 100 is slidably connected to the second telescopic rod group 200, the second end of the threaded rod 140 is connected to the second telescopic rod group 200, and the first telescopic rod 110 can switch between the extended position and the retracted position relative to the second telescopic rod group 200; the limit assembly 300 is sleeved on the threaded rod 140, and the limit assembly 300 is slidably connected to a plurality of limit columns 150, the limit assembly 300 is located between the first driving member 120 and the second telescopic rod group 200, the limit assembly 300 includes a first limit slip ring 310 and a second limit slip ring 320, the first limit slip ring 310 and the second limit slip ring 320 are arranged along the axial direction of the threaded rod 140, and the first limit slip ring 310 and the second limit slip ring 320 are arranged along the axial direction of the threaded rod 140. A positive pressure oil chamber 332 and a negative pressure oil chamber 334 are provided, and the positive pressure oil chamber 332 and the negative pressure oil chamber 334 are both connected to the limit column 150; a reset spring 500; the second driving member 130 is used to drive the limit assembly 300 to work, so that the limit assembly 300 cooperates with the threaded rod 140 through one of the first limit slip ring 310 and the second limit slip ring 320; the threaded rod 140 rotates along the first direction to drive the limit assembly 300 to move in a direction away from the first driving member 120 through the first limit slip ring 310 or the second limit slip ring 320 that cooperates with the threaded rod 140, so that the first telescopic rod 110 is separated from the second telescopic rod group 200 and moves to the extended position; the threaded rod 140 rotates along the first direction The first telescopic rod 110 is rotated in the second direction to drive the limiting assembly 300 to move toward the first driving member 120 through the first limiting slip ring 310 or the second limiting slip ring 320 matched with the threaded rod 140, and the reset spring 500 drives the first telescopic rod 110 to reset to the retracted position; wherein, when the first telescopic rod 110 switches between the extended position and the retracted position, one of the first limiting slip ring 310 and the second limiting slip ring 320 can apply oil to a part of the plurality of limiting columns 150 through the positive pressure oil chamber 332, and the other of the first limiting slip ring 310 and the second limiting slip ring 320 can absorb oil from another part of the plurality of limiting columns 150 through the negative pressure oil chamber 334.

[0045] In this embodiment, the automobile electric tailgate support rod 10 includes a first telescopic rod group 100 , a second telescopic rod group 200 , a limit assembly 300 and a return spring 500 .

[0046] The first telescopic rod assembly 100 includes a first telescopic rod 110 , a first driving member 120 , a second driving member 130 , a limiting column 150 and a threaded rod 140 .

[0047] The first telescopic rod set 100 is slidably connected to the second telescopic rod set 200 .

[0048] The limiting assembly 300 is sleeved on the threaded rod 140 , and the limiting assembly 300 includes a first limiting slip ring 310 and a second limiting slip ring 320 .

[0049] The first telescopic rod 110 can switch between an extended position and a retracted position relative to the second telescopic rod group 200. Specifically, take the cooperation between the first limit slip ring 310 and the threaded rod 140 as an example. The second driving member 130 drives the limit assembly 300 to work so that the first limit slip ring 310 cooperates with the threaded rod 140. The first driving member 120 drives the threaded rod 140 to rotate along the first direction, so as to drive the limit assembly 300 to move in a direction away from the first driving member 120 through the first limit slip ring 310 that cooperates with the threaded rod 140, so that the first telescopic rod 110 is separated from the second telescopic rod group 200 and moves to the extended position. At the same time, the second limit slip ring 320 that is not cooperated with the threaded rod 140 will also move in a direction away from the first driving member 120. The first driving member 120 drives the threaded rod 140 to rotate along the second direction, so as to drive the limiting assembly 300 to move toward the first driving member 120 through the first limiting slip ring 310 matched with the threaded rod 140. Under the action of the return spring 500 of the automobile electric tailgate support rod 10, the first telescopic rod 110 moves to a retracted position relative to the second telescopic rod assembly 200. At the same time, the second limiting slip ring 320 that is not matched with the threaded rod 140 will also move toward the direction of the first driving member 120.

[0050] Further, a plurality of limiting posts 150 are provided in the first telescopic rod 110, and the plurality of limiting posts 150 are arranged at intervals along the circumference of the threaded rod 140, and each limiting post 150 extends along the axial direction of the threaded rod 140. The limiting assembly 300 is slidably connected to the limiting post 150, and the limiting assembly 300 is movably connected to the threaded rod 140. The limiting assembly 300 includes a first limiting slip ring 310 and a second limiting slip ring 320. The first limiting slip ring 310 is provided with a positive pressure oil chamber 332 and a negative pressure oil chamber 334, the positive pressure oil chamber 332 is communicated with the limiting post 150, and the negative pressure oil chamber 334 is communicated with the limiting post 150. The second limiting slip ring 320 is provided with a positive pressure oil chamber 332 and a negative pressure oil chamber 334, the positive pressure oil chamber 332 is communicated with the limiting post 150, and the negative pressure oil chamber 334 is communicated with the limiting post 150.

[0051] When the first telescopic rod 110 switches between the extended position and the retracted position, one of the first limiting slip ring 310 and the second limiting slip ring 320 can apply oil to a part of the limiting posts 150 among the plurality of limiting posts 150 through the positive pressure oil chamber 332, and the other of the first limiting slip ring 310 and the second limiting slip ring 320 can absorb oil from another part of the limiting posts 150 among the plurality of limiting posts 150 through the negative pressure oil chamber 334. That is, the positive pressure oil chamber 332 of the first limiting slip ring 310 can apply oil to the limiting posts 150, and the negative pressure oil chamber 334 of the second limiting slip ring 320 can absorb oil from the limiting posts 150. Alternatively, the positive pressure oil chamber 332 of the second limiting slip ring 320 can apply oil to the limiting posts 150, and the negative pressure oil chamber 334 of the first limiting slip ring 310 can absorb oil from the limiting posts 150.

[0052] When the use frequency of the electric tailgate support rod 10 of the automobile is high, oil is applied to a part of the plurality of limit posts 150 through the positive pressure oil chamber 332 of one of the first limit slip ring 310 and the second limit slip ring 320, and another part of the plurality of limit posts 150 is in an unoiled state. In other words, only a part of the plurality of limit posts 150 is in an oiled state, and the limit posts 150 coated with lubricating oil have the function of slidingly cooperating with the limit assembly 300 to guide the limit assembly 300, so as to meet the use requirements of the first telescopic rod 110 switching between the extended position and the retracted position.

[0053] Whether the other of the first limiting slip ring 310 and the second limiting slip ring 320 absorbs oil from the limiting column 150 depends on whether the lubricating oil on the limiting column 150 deteriorates. When the electric tailgate support rod 10 of the automobile is not used for a long time, by switching the position of the first telescopic rod 110 (i.e., the extended position and the retracted position) and combining the working mode of the second driving member 130, one of the first limiting slip ring 310 and the second limiting slip ring 320 can absorb waste oil from the limiting column 150 coated with waste oil, and the other of the first limiting slip ring 310 and the second limiting slip ring 320 can apply oil to the limiting column 150 not coated with lubricating oil.

[0054] like Figure 5As shown, the number of the limiting posts 150 is four for example. The four limiting posts 150 are respectively recorded as the first limiting post 1501, the second limiting post 1502, the third limiting post 1503 and the fourth limiting post 1504, and the first limiting post 1501 and the fourth limiting post 1504 are coated with lubricating oil. When the electric tailgate support rod 10 of the automobile is not used for a long time, the positive pressure oil chamber 332 of the first limiting slip ring 310 can be oiled to the second limiting post 1502 and the third limiting post 1503 by switching the position of the first telescopic rod 110 (i.e., the extended position and the retracted position) and combining the working mode of the second driving member 130, and the negative pressure oil chamber 334 of the second limiting slip ring 320 absorbs oil from the first limiting post 1501 and the fourth limiting post 1504, so as to absorb the waste oil at the first limiting post 1501 and the fourth limiting post 1504.

[0055] In this way, the lubricating oil at the limiting column 150 of the guiding limiting assembly 300 is always in a normal use state, which can avoid the situation where the limiting assembly 300 is stuck at a certain position of the limiting column 150 due to the deterioration of the lubricating oil and the poor lubrication effect. The smoothness of the sliding connection between the limiting assembly 300 and the limiting column 150 can be ensured, so that the first telescopic rod 110 can be effectively and smoothly switched between the extended position and the retracted position. This setting enables the limiting assembly 300 to not only provide structural support for the switching of the first telescopic rod 110 between the extended position and the retracted position, but also has the function of coating and replacing new lubricating oil on the limiting column 150, enriching the function of the limiting assembly 300 and improving the performance of the product.

[0056] It is understandable that the second driving member 130 is used to drive the limiting assembly 300 to work so that one of the first limiting slip ring 310 and the second limiting slip ring 320 cooperates with the threaded rod 140. That is, the first limiting slip ring 310 or the second limiting slip ring 320 that cooperates with the threaded rod 140 is a force-bearing member, and the second limiting slip ring 320 or the first limiting slip ring 310 that does not cooperate with the threaded rod 140 is a non-force-bearing member. Therefore, the working time of the first limiting slip ring 310 and the second limiting slip ring 320 can be balanced by switching the force-bearing member, which is conducive to extending the service life of the first limiting slip ring 310 and the second limiting slip ring 320, and further conducive to reducing the repair and maintenance frequency of the automobile electric tailgate support rod 10.

[0057] In some embodiments, Figure 7 , Figure 8 and Fig.10As shown, the first limit slip ring 310 and the second limit slip ring 320 both include: a ring body 330, the ring body 330 is provided with a positive pressure oil chamber 332 and a negative pressure oil chamber 334; a sliding limit column 340, which is slidably connected to the ring body 330. When the second driving member 130 drives the limit assembly 300 to work, the sliding limit column 340 of one of the first limit slip ring 310 and the second limit slip ring 320 is abutted against the spiral groove of the threaded rod 140, and the sliding limit column 340 of the other of the first limit slip ring 310 and the second limit slip ring 320 is separated from the threaded rod 140.

[0058] In this embodiment, the structures of the first limiting slip ring 310 and the second limiting slip ring 320 are further defined.

[0059] The first limiting slip ring 310 includes a ring body 330 and a sliding limiting column 340. The ring body 330 is sleeved on the threaded rod 140. The ring body 330 is provided with a positive pressure oil chamber 332 and a negative pressure oil chamber 334. The sliding limiting column 340 is slidably connected to the ring body 330. The second limiting slip ring 320 includes a ring body 330 and a sliding limiting column 340. The ring body 330 is sleeved on the threaded rod 140. The ring body 330 is provided with a positive pressure oil chamber 332 and a negative pressure oil chamber 334. The sliding limiting column 340 is slidably connected to the ring body 330.

[0060] When the second driving member 130 drives the limiting assembly 300 to work, it can adjust the setting position of the sliding limiting column 340 and the ring body 330, adjust the setting position of the sliding limiting column 340 and the threaded rod 140 of the first limiting slip ring 310, so that the sliding limiting column 340 of the first limiting slip ring 310 abuts against the spiral groove of the threaded rod 140, and adjust the setting position of the sliding limiting column 340 and the threaded rod 140 of the second limiting slip ring 320, so that the sliding limiting column 340 of the second limiting slip ring 320 is separated from the threaded rod 140.

[0061] Alternatively, when the second driving member 130 drives the limiting assembly 300 to work, it is able to adjust the setting positions of the sliding limiting column 340 and the ring body 330, adjust the setting positions of the sliding limiting column 340 and the threaded rod 140 of the second limiting slip ring 320, so that the sliding limiting column 340 of the second limiting slip ring 320 abuts against the spiral groove of the threaded rod 140, and adjust the setting positions of the sliding limiting column 340 and the threaded rod 140 of the first limiting slip ring 310, so that the sliding limiting column 340 of the first limiting slip ring 310 is separated from the threaded rod 140.

[0062] This is to meet the requirement that the first limiting slip ring 310 or the second limiting slip ring 320 abutting against the spiral groove of the threaded rod 140 is a force-bearing member, and the second limiting slip ring 320 or the first limiting slip ring 310 not matched with the threaded rod 140 is a non-force-bearing member.

[0063] In some embodiments, Figure 5As shown, the number of the limiting posts 150 is N, and the N limiting posts 150 are arranged at intervals along the circumference of the threaded rod 140; the outer peripheral wall of the ring body 330 of the first limiting slip ring 310 is provided with N / 2 grooves 350 and N / 2 avoidance grooves 360, and the outer peripheral wall of the ring body 330 of the second limiting slip ring 320 is provided with N / 2 grooves 350 and N / 2 avoidance grooves 360, each groove 350 is slidably connected to a limiting post 150, each groove 350 of the first limiting slip ring 310 is arranged opposite to an avoidance groove 360 ​​of the second limiting slip ring 320, and the avoidance groove 360 ​​is used to avoid the limiting post 150; in the ring body 330, the positive pressure oil chamber 332 and the negative pressure oil chamber 334 are both connected to the groove 350; wherein N≥2×n, and n is a positive integer.

[0064] In this embodiment, the matching structure of N limiting pillars 150 , the first limiting slip ring 310 and the second limiting slip ring 320 is further defined.

[0065] The number of the limiting posts 150 is N, and the N limiting posts 150 are arranged at intervals along the circumference of the threaded rod 140 .

[0066] The outer circumferential wall of the ring body 330 of the first limiting slip ring 310 is provided with N / 2 grooves 350 and N / 2 avoidance grooves 360, and the outer circumferential wall of the ring body 330 of the second limiting slip ring 320 is provided with N / 2 grooves 350 and N / 2 avoidance grooves 360. That is, the sum of the number of the grooves 350 of the first limiting slip ring 310 and the number of the grooves 350 of the second limiting slip ring 320 is equal to the number of the limiting posts 150. Similarly, the sum of the number of the avoidance grooves 360 of the first limiting slip ring 310 and the number of the avoidance grooves 360 of the second limiting slip ring 320 is equal to the number of the limiting posts 150.

[0067] Each groove 350 is slidably connected to a limiting column 150, and the groove 350 has the function of slidingly cooperating with the limiting column 150, and the groove 350 has the function of connecting the positive pressure oil chamber 332 and the limiting column 150, and the groove 350 also has the function of connecting the negative pressure oil chamber 334 and the limiting column 150. This arrangement can not only meet the use requirements of the limiting assembly 300 and the limiting column 150 being slidably connected, but also meet the use requirements of applying oil to the limiting column 150 and absorbing oil from the limiting column 150.

[0068] Among them, each groove 350 of the first limiting slip ring 310 is arranged opposite to an avoidance groove 360 ​​of the second limiting slip ring 320, and the avoidance groove 360 ​​has the function of avoiding the limiting column 150. That is, the groove 350 of the first limiting slip ring 310 and the groove 350 of the second limiting slide groove are arranged in a staggered manner. In this way, when the electric tailgate support rod 10 of the automobile is not used for a long time, it can meet the requirements of sucking waste oil from the limiting column 150 coated with waste oil by one of the first limiting slip ring 310 and the second limiting slip ring 320, and meet the requirements of applying oil to the limiting column 150 not coated with lubricating oil by the other of the first limiting slip ring 310 and the second limiting slip ring 320.

[0069] Alternatively, if Fig.10 As shown, the groove wall of the groove 350 is provided with a connecting gap 800 and an extended gap 900 , the connecting gap 800 is connected to the positive pressure oil chamber 332 , and the extended gap 900 is connected to the negative pressure oil chamber 334 .

[0070] N≥2×n, where n is a positive integer. Specifically, N=2, N=4, and N=6, etc. are not listed here one by one.

[0071] In some embodiments, Figure 8 As shown, the limit assembly 300 also includes: a limit sleeve 370, which is sleeved on the threaded rod 140, and the limit sleeve 370 is slidably connected to the threaded rod 140, the first limit slip ring 310 and the second limit slip ring 320 are both sleeved on the limit sleeve 370, the limit sleeve 370 is provided with a guide bevel 372, the guide bevel 372 passes through the outer wall and the inner wall of the limit sleeve 370, and the sliding limit column 340 is connected to the guide bevel 372; wherein, the second driving member 130 is used to drive the limit sleeve 370 to rotate, and the guide bevel 372 is used to drive the sliding limit column 340 to move relative to the ring body 330 when the limit sleeve 370 rotates.

[0072] In this embodiment, the structure of the limiting assembly 300 is further defined.

[0073] The limiting assembly 300 further includes a limiting sleeve 370 , which is sleeved on the threaded rod 140 and can move along the axial direction of the threaded rod 140 .

[0074] The first limiting slip ring 310 and the second limiting slip ring 320 are both sleeved on the limiting sleeve 370 . When one of the first limiting slip ring 310 and the second limiting slip ring 320 cooperates with the threaded rod 140 , the other of the first limiting slip ring 310 and the second limiting slip ring 320 can move accordingly under the action of the limiting sleeve 370 .

[0075] The limiting sleeve 370 is provided with a guide bevel 372, which passes through the outer circumferential wall and the inner circumferential wall of the limiting sleeve 370, and the sliding limiting column 340 is connected to the guide bevel 372. The second driving member 130 drives the limiting sleeve 370 to rotate, the limiting sleeve 370 rotates, and the guide bevel 372 rotates accordingly, and the guide bevel 372 drives the sliding limiting column 340 to move relative to the ring body 330, so that the sliding limiting column 340 of one of the first limiting slip ring 310 and the second limiting slip ring 320 is lifted, and the sliding limiting column 340 of the other of the first limiting slip ring 310 and the second limiting slip ring 320 is lowered. The lowered sliding limiting column 340 is used to abut and cooperate with the spiral groove of the threaded rod 140, and can drive the limiting assembly 300 to move under the rotation of the threaded rod 140, so that the first telescopic rod 110 is separated from the second telescopic rod group 200 and moves to the extended position.

[0076] In this embodiment, the second driving member 130 is fixedly connected to the first telescopic rod 110 , and the second driving member 130 is detachably connected to the limiting assembly 300 .

[0077] In some other embodiments, the second driving member 130 is slidably connected to the first telescopic rod 110 , and the second driving member 130 can move along the axial direction of the threaded rod 140 along with the limiting assembly 300 .

[0078] Optionally, the number of the limiting posts 150 includes but is not limited to four, and may also be six, eight, etc., which are not listed here one by one.

[0079] In some embodiments, Figure 3 , Figure 5 and Figure 7 As shown, the first driving member 120 includes a first motor 122 and a planetary reducer 124, and the first motor 122 is connected to the threaded rod 140 through the planetary reducer 124; a bevel gear 374 is provided at one end of the limiting sleeve 370 away from the first driving member 120, and the second driving member 130 includes a second motor, and the output end of the second motor is meshed with the bevel gear 374.

[0080] In this embodiment, the structures of the first driving member 120 and the second driving member 130 are further defined.

[0081] The first driving member 120 includes a first motor 122 and a planetary reducer 124. The first motor 122 is connected to the threaded rod 140 via the planetary reducer 124. The first motor 122 is used to drive the threaded rod 140 to rotate.

[0082] The end of the limiting sleeve 370 away from the first driving member 120 is provided with a bevel gear 374. The second driving member 130 includes a second motor having an output end, and the output end of the second motor cooperates with the bevel gear 374 to achieve the purpose of driving the limiting sleeve 370 to rotate.

[0083] In some embodiments, when the first limit slip ring 310 cooperates with the threaded rod 140, oil can be applied to a portion of the multiple limit posts 150 through the positive pressure oil chamber 332 of the first limit slip ring 310; when the second limit slip ring 320 cooperates with the threaded rod 140, oil can be applied to a portion of the multiple limit posts 150 through the positive pressure oil chamber 332 of the second limit slip ring 320.

[0084] In this embodiment, the matching structure of the first limiting slip ring 310 , the second limiting slip ring 320 , the threaded rod 140 and the plurality of limiting posts 150 is further defined.

[0085] It can be understood that the limiting assembly 300 is slidably connected to the plurality of limiting posts 150 , and therefore, the limiting assembly 300 and any limiting post 150 among the plurality of limiting posts 150 are clearance-fitted.

[0086] Specifically, Figure 8 and Fig. 9 As shown, there is a large gap between the limiting column 150 and the groove wall of the groove 350 of the limiting assembly 300 to meet the use requirements of the limiting assembly 300 and the plurality of limiting columns 150 being slidably connected. For example, the radius of the limiting column 150 is smaller than the radius corresponding to the groove wall of the groove 350.

[0087] The limiting slip ring matched with the threaded rod 140 is a force-bearing member, and the limiting slip ring not matched with the threaded rod 140 is a non-force-bearing member. Therefore, the limiting slip ring matched with the threaded rod 140 is used to apply oil to a part of the limiting columns 150 among the plurality of limiting columns 150, that is, the force-bearing member applies oil to a part of the limiting columns 150 among the plurality of limiting columns 150. The non-force-bearing member is either in a non-working state (that is, the limiting column 150 matched with the non-force-bearing member is in an oil-free state, and the non-force-bearing member does not need to absorb oil from the limiting column 150), or in a working state (that is, the non-force-bearing member absorbs oil from another part of the limiting columns 150 among the plurality of limiting columns 150).

[0088] Since the limit column 150 coated with lubricating oil has the function of slidingly cooperating with the limit assembly 300, the above-mentioned limitation can reduce the amount of wear generated between the non-stress-bearing parts and the limit column 150 during the relative sliding process, and minimize the contact area between the un-oiled limit column 150 and the non-stress-bearing parts during the relative sliding process.

[0089] It can be understood that the sliding limit column 340 of the non-stress-bearing part in a non-working state or in a working state does not contact the threaded rod 140, and the non-stress-bearing part is in a state without being subjected to deflection force. Therefore, the non-stress-bearing part will not be tightly attached to the limit column 150 (that is, the non-stress-bearing part can rotate slightly), thereby avoiding wear when the non-stress-bearing part and the limit column 150 slide relative to each other.

[0090] As for the force-bearing member, the force-bearing member is subjected to the deflection force provided by the threaded rod 140 , so that the limiting column 150 coated with lubricating oil can be brought into contact with the force-bearing member to achieve the limiting effect on the force-bearing member.

[0091] In some embodiments, the plurality of limiting posts 150 are arranged at equal intervals along the circumference of the threaded rod 140 .

[0092] In this embodiment, the arrangement defines the arrangement positions of the plurality of limiting posts 150, so that the plurality of limiting posts 150 are arranged at equal intervals along the circumference of the threaded rod 140. This arrangement enables the limiting assembly 300 to slide more smoothly.

[0093] For example, when the number of the limiting posts 150 is four, oil may be applied to two limiting posts 150 located at the diagonal line.

[0094] For example, when the number of the limiting pillars 150 is six, three of the limiting pillars 150 may be oiled at intervals.

[0095] In some embodiments, the number of the first limiting slip ring 310 is at least one, and the number of the second limiting slip ring 320 is at least one; when the number of the first limiting slip ring 310 and the second limiting slip ring 320 are both multiple, the multiple first limiting slip rings 310 are located on the same side of the multiple second limiting slip rings 320, or at least one second limiting slip ring 320 is arranged between any two adjacent first limiting slip rings 310.

[0096] In this embodiment, the number and arrangement positions of the first limiting slip rings 310 and the second limiting slip rings 320 are further limited.

[0097] The number of the first limiting slip ring 310 is at least one, and the number of the second limiting slip ring 320 is at least one.

[0098] When there are multiple first position-limiting slip rings 310 and multiple second position-limiting slip rings 320 , the multiple first position-limiting slip rings 310 are located on the same side of the multiple second position-limiting slip rings 320 .

[0099] When there are multiple first limiting slip rings 310 and multiple second limiting slip rings 320 , at least one second limiting slip ring 320 is disposed between any two adjacent first limiting slip rings 310 .

[0100] The number and location of the first limiting slip ring 310 and the second limiting slip ring 320 may be set according to specific actual use requirements.

[0101] In some embodiments, Fig.11 As shown, the first limiting slip ring 310 and the second limiting slip ring 320 are also provided with a first one-way valve 380 and a second one-way valve 390, the first one-way valve 380 is connected to the positive pressure oil chamber 332, and the second one-way valve 390 is connected to the negative pressure oil chamber 334, and the first telescopic rod group 100 also includes: a lubricating oil assembly 160, which is connected to the threaded rod 140, and the lubricating oil assembly 160 is located between the limiting component 300 and the first driving member 120, and the oil outlet pipe of the lubricating oil assembly 160 is detachably connected to the first one-way valve 380, and the oil suction pipe of the lubricating oil assembly 160 is detachably connected to the second one-way valve 390.

[0102] In this embodiment, the matching structure of the first limiting slip ring 310 and the second limiting slip ring 320 is further defined.

[0103] The first limiting sliding ring 310 is provided with a first one-way valve 380 , and the first limiting sliding ring 310 is also provided with a second one-way valve 390 . The first one-way valve 380 is communicated with the positive pressure oil chamber 332 , and the second one-way valve 390 is communicated with the negative pressure oil chamber 334 .

[0104] The second limiting sliding ring 320 is provided with a first one-way valve 380 , and the second limiting sliding ring 320 is further provided with a second one-way valve 390 . The first one-way valve 380 is communicated with the positive pressure oil chamber 332 , and the second one-way valve 390 is communicated with the negative pressure oil chamber 334 .

[0105] The first telescopic rod assembly 100 further includes a lubricating oil assembly 160, which is fixedly connected to the threaded rod 140 and has an oil outlet pipe and an oil suction pipe. The oil outlet pipe of the lubricating oil assembly 160 is detachably connected to the first one-way valve 380, and the oil suction pipe of the lubricating oil assembly 160 is detachably connected to the second one-way valve 390.

[0106] When the oil outlet pipe of the lubricating oil assembly 160 is assembled with the first one-way valve 380, the lubricating oil assembly 160 supplies lubricating oil to the positive pressure oil chamber 332 through the oil outlet pipe and the first one-way valve 380. When the oil suction pipe of the lubricating oil assembly 160 is assembled with the second one-way valve 390, the lubricating oil assembly 160 sucks the lubricating oil of the negative pressure oil chamber 334 through the oil suction pipe.

[0107] When the limit assembly 300 moves along the axial direction of the threaded rod 140, the limit assembly 300 is disconnected from the lubricating oil assembly 160. Under the action of the first one-way valve 380, the positive pressure oil chamber 332 forms a closed chamber. Under the action of the second one-way valve 390, the negative pressure oil chamber 334 forms a closed chamber. This setting provides structural support for the subsequent positive pressure oil chamber 332 to apply oil to the limit column 150, and the negative pressure oil chamber 334 absorbs oil from the limit column 150.

[0108] In some embodiments, Figure 8 and Fig.10 As shown, air bags 400 are provided in both the positive pressure oil chamber 332 and the negative pressure oil chamber 334 .

[0109] In this embodiment, the structures of the positive-pressure oil chamber 332 and the negative-pressure oil chamber 334 are further defined.

[0110] The airbag 400 is provided in both the positive pressure oil chamber 332 and the negative pressure oil chamber 334. That is, the airbag 400 is provided in the positive pressure oil chamber 332, and the airbag 400 is provided in the negative pressure oil chamber 334. The airbag 400 in the positive pressure oil chamber 332 is fixedly connected to the cavity wall of the positive pressure oil chamber 332. The airbag 400 in the negative pressure oil chamber 334 is fixedly connected to the cavity wall of the negative pressure oil chamber 334.

[0111] When positive pressure and negative pressure are formed in the positive pressure oil chamber 332 and the negative pressure oil chamber 334, the airbag 400 will shrink or expand to store some energy. During the axial movement of the limit assembly 300 along the threaded rod 140, the airbag 400 will slowly release energy to ensure the effectiveness and feasibility of the positive pressure oil chamber 332 applying oil to the limit column 150 and the negative pressure oil chamber 334 absorbing oil from the limit column 150.

[0112] In some embodiments, Figure 3 and Figure 4 As shown, the second telescopic rod group 200 includes: a second telescopic rod 210; a top rod 220, the second telescopic rod 210 is arranged around the top rod 220, the top rod 220 is provided with a matching groove 222, and the second end of the threaded rod 140 is connected to the matching groove 222; the first telescopic rod group 100 also includes a limiting rod 170, the limiting rod 170 is connected to the first telescopic rod 110, the limiting rod 170 is arranged around the threaded rod 140, and the inner surface of the limiting rod 170 is provided with a limiting column 150; when the first telescopic rod 110 is in the retracted position, the top rod 220 is located between the threaded rod 140 and the limiting rod 170, the reset spring 500 is located between the limiting rod 170 and the second telescopic rod 210, and the reset spring 500 is in contact with the first telescopic rod group 100.

[0113] In this embodiment, the structures of the second telescopic rod set 200 and the first telescopic rod set 100 are further defined.

[0114] The second telescopic rod assembly 200 includes a second telescopic rod 210 and a top rod 220 .

[0115] The first telescopic rod set 100 further includes a limiting rod 170 .

[0116] The vehicle electric tailgate support rod 10 further includes a return spring 500 .

[0117] When the first telescopic rod 110 is in the retracted position, the top rod 220 is located between the threaded rod 140 and the limiting rod 170, the return spring 500 is located between the limiting rod 170 and the second telescopic rod 210, and the return spring 500 is in contact with the first telescopic rod assembly 100. At this time, the return spring 500 is in a compressed state, and the return spring 500 is used to drive the first telescopic rod 110 to move to the retracted position relative to the second telescopic rod assembly 200.

[0118] The first telescopic rod 110, the limiting rod 170, the second telescopic rod 210 and the top rod 220 cooperate to form a multi-layer protection to reduce the probability of water vapor, dirt, etc. in the environment entering the automobile electric tailgate support rod 10 through the connection between the first telescopic rod group 100 and the second telescopic rod group 200.

[0119] Optionally, when the first telescopic rod 110 is located at the retracted position, a portion of the first telescopic rod 110 extends into the second telescopic rod 210 .

[0120] Alternatively, if Figure 1 , Figure 2 and Figure 3 As shown, the electric tailgate support rod 10 of the automobile further includes a fixing block 600 , which is connected to the first telescopic rod assembly 100 , and the fixing block 600 is used to be connected to the electric tailgate of the automobile.

[0121] Alternatively, if Figure 1 , Figure 2 and Figure 3 As shown, the electric tailgate support rod 10 of the automobile further includes a control cable 700 , and the control cable 700 is used to be electrically connected to a controller of the automobile.

[0122] Optionally, the fixed block 600 is fixedly connected to the first telescopic rod 110. The control cable 700 is fixedly connected to the first telescopic rod 110. The second telescopic rod 210 is slidably connected to the first telescopic rod 110. The first motor 122 (e.g., a rotating motor) is fixedly connected to the first telescopic rod 110. The planetary reducer 124 is fixedly connected to the first telescopic rod 110. The return spring 500 supports the second telescopic rod 210. The top rod 220 is fixedly connected to the second telescopic rod 210. The threaded rod 140 is fixedly connected to the planetary reducer 124, and the threaded rod 140 is driven to rotate by the planetary reducer 124. The limit rod 170 is fixedly connected to the first telescopic rod 110. The limit sleeve 370 is slidably connected to the threaded rod 140. The first limit slip ring 310 is slidably connected to the limit rod 170, and the second limit slip ring 320 is slidably connected to the limit rod 170. The first limiting slip ring 310 is movably connected to the limiting sleeve 370, and the second limiting slip ring 320 is movably connected to the limiting sleeve 370. The second motor is fixedly connected to the first telescopic rod 110, and the second motor drives the limiting sleeve 370 to rotate. The lubricating oil assembly 160 is fixedly connected to the first telescopic rod 110. The lubricating oil assembly 160 is provided with an oil outlet pipe and an oil suction pipe, the oil outlet pipe is connected to the positive pressure oil chamber 332, and the oil suction pipe is connected to the negative pressure oil chamber 334. The first limiting slip ring 310 and the second limiting slip ring 320 are also provided with a liquid inlet 410 and a liquid outlet 420, the liquid inlet 410 is connected to the positive pressure oil chamber 332, the liquid outlet 420 is connected to the negative pressure oil chamber 334, the positive pressure oil chamber 332 and the oil outlet pipe of the lubricating oil assembly 160 are connected through the liquid inlet 410, and the negative pressure oil chamber 334 and the oil suction pipe of the lubricating oil assembly 160 are connected through the liquid outlet 420. The grooves 350 of the first limiting sliding ring 310 and the second limiting sliding ring 320 are both provided with a connecting gap 800 and an extended gap 900. The connecting gap 800 is connected to the positive pressure oil chamber 332, and the extended gap 900 is connected to the negative pressure oil chamber 334. The sliding limiting column 340 is slidably connected to the ring body 330. The inner surface of the limiting rod 170 is provided with a limiting column 150. The guiding inclined groove 372 is located on the limiting sleeve 370, and the rotation of the limiting sleeve 370 can drive the sliding limiting column 340 to move up and down.

[0123] When the automobile electric tailgate support rod 10 starts working, the rotating motor drives the threaded rod 140 to rotate through the planetary reducer 124, the threaded rod 140 cooperates with one of the first limit slip ring 310 and the second limit slip ring 320, and the limit assembly 300 is slidably connected with the limit column 150 in the limit rod 170, thereby driving the limit assembly 300 to move along the axial direction of the threaded rod 140, so that the first telescopic rod 110 slides relative to the second telescopic rod group 200.

[0124] The limiting sleeve 370 is driven to rotate by the second motor, and the limiting sleeve 370 rotates to lift the sliding limiting column 340 of one of the first limiting slip ring 310 and the second limiting slip ring 320, and to lower the sliding limiting column 340 of the other of the first limiting slip ring 310 and the second limiting slip ring 320. The first limiting slip ring 310 or the second limiting slip ring 320 whose sliding limiting column 340 is lowered cooperates with the threaded rod 140, thereby ensuring that there is a sliding limiting column 340 that slides in the spiral groove of the threaded rod 140.

[0125] When the electric tailgate support rod 10 of the automobile has not been used for a long time, the second motor works to drive the limiting sleeve 370 to rotate, switch the sliding limiting column 340, so that one of the first limiting slip ring 310 and the second limiting slip ring 320 cooperates with the threaded rod 140, and the other of the first limiting slip ring 310 and the second limiting slip ring 320 moves with the limiting sleeve 370, which is beneficial to prolonging the service life of the electric tailgate support rod 10 of the automobile.

[0126] When the first threaded rod 140 is in the retracted position, the liquid inlet 410 and the liquid outlet 420 of any one of the first limit slip ring 310 and the second limit slip ring 320 are both connected to the lubricating oil assembly 160. The lubricating oil assembly 160 is connected to replenish the pressure to the positive pressure oil chamber 332 and the negative pressure oil chamber 334, so as to shrink or enlarge the airbag 400, so that when the limit assembly 300 moves along the threaded rod 140, one of the first limit slip ring 310 and the second limit slip ring 320 applies oil to the limit column 150 to increase lubrication, and the other of the first limit slip ring 310 and the second limit slip ring 320 absorbs the waste oil at the limit column 150.

[0127] It is understandable that if the electric tailgate support rod 10 of the automobile is in a state of frequent use, the first limiting slip ring 310 and the second limiting slip ring 320 used for switching the second motor are not needed, and the lubricating oil assembly 160 is not needed to absorb and replenish oil.

[0128] Optionally, the above operations of the automobile electric tailgate support rod 10 are controlled by a chip.

[0129] Optionally, a ball 430 is provided at the end of the sliding limit column 340 , and the lubricating oil can flow to the threaded rod 140 via the guiding inclined groove 372 and the ball 430 .

[0130] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0131] The above-described embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A vehicle electric tailgate support rod (10), characterized in that: include: A first telescopic rod group (100), the first telescopic rod group (100) comprising a first telescopic rod (110), a first driving member (120), a second driving member (130) and a threaded rod (140); a plurality of limiting posts (150) are arranged at intervals along the circumference of the threaded rod (140) in the first telescopic rod (110); each of the limiting posts (150) extends along the axial direction of the threaded rod (140); the first driving member (120) and the second driving member (130) are both arranged in the first telescopic rod (110); a first end of the threaded rod (140) is connected to the first driving member (120); and the first driving member (120) is used to drive the threaded rod (140) to rotate; a second telescopic rod group (200), wherein the first telescopic rod group (100) is slidably connected to the second telescopic rod group (200), the second end of the threaded rod (140) is threaded through the second telescopic rod group (200), and the first telescopic rod (110) is switchable between an extended position and a retracted position relative to the second telescopic rod group (200); a limit assembly (300) sleeved on the threaded rod (140), and the limit assembly (300) is slidably connected to the plurality of limit posts (150); the limit assembly (300) is located between the first driving member (120) and the second telescopic rod group (200); the limit assembly (300) comprises a first limit slip ring (310) and a second limit slip ring (320); the first limit slip ring (310) and the second limit slip ring (320) are arranged along the axial direction of the threaded rod (140); the first limit slip ring (310) and the second limit slip ring (320) are both provided with a positive pressure oil chamber (332) and a negative pressure oil chamber (334); the positive pressure oil chamber (332) and the negative pressure oil chamber (334) are both in communication with the limit posts (150); Return spring (500); The second driving member (130) is used to drive the limiting assembly (300) to work, so that the limiting assembly (300) cooperates with the threaded rod (140) through one of the first limiting slip ring (310) and the second limiting slip ring (320); The threaded rod (140) rotates in a first direction to drive the limiting assembly (300) to move in a direction away from the first driving member (120) via the first limiting slip ring (310) or the second limiting slip ring (320) matched with the threaded rod (140), so that the first telescopic rod (110) is separated from the second telescopic rod assembly (200) and moves to an extended position; The threaded rod (140) rotates in a second direction to drive the limiting assembly (300) to move toward the first driving member (120) via the first limiting slip ring (310) or the second limiting slip ring (320) matched with the threaded rod (140), and the return spring (500) drives the first telescopic rod (110) to return to the retracted position; Wherein, when the first telescopic rod (110) switches between the extended position and the retracted position, one of the first limiting slip ring (310) and the second limiting slip ring (320) can apply oil to a part of the limiting columns (150) among the plurality of limiting columns (150) through the positive pressure oil chamber (332), and the other of the first limiting slip ring (310) and the second limiting slip ring (320) can absorb oil from another part of the limiting columns (150) among the plurality of limiting columns (150) through the negative pressure oil chamber (334); The first limiting slip ring (310) and the second limiting slip ring (320) both comprise: A ring body (330), wherein the ring body (330) is provided with the positive-pressure oil chamber (332) and the negative-pressure oil chamber (334); a sliding limit post (340) slidably connected to the ring body (330), so that when the second driving member (130) drives the limit assembly (300) to work, the sliding limit post (340) of one of the first limit slip ring (310) and the second limit slip ring (320) is brought into contact with the spiral groove of the threaded rod (140), and the sliding limit post (340) of the other of the first limit slip ring (310) and the second limit slip ring (320) is separated from the threaded rod (140); The limiting assembly (300) further includes: A limiting sleeve (370) is sleeved on the threaded rod (140), and the limiting sleeve (370) is slidably connected to the threaded rod (140); the first limiting sliding ring (310) and the second limiting sliding ring (320) are both sleeved on the limiting sleeve (370); the limiting sleeve (370) is provided with a guiding inclined groove (372); the guiding inclined groove (372) passes through the outer peripheral wall and the inner peripheral wall of the limiting sleeve (370); and the sliding limiting column (340) is connected to the guiding inclined groove (372); The second driving member (130) is used to drive the limiting sleeve (370) to rotate, and the guiding inclined groove (372) is used to drive the sliding limiting column (340) to move relative to the ring body (330) when the limiting sleeve (370) rotates.

2. The automobile electric tailgate support rod (10) according to claim 1, characterized in that: The number of the limiting posts (150) is N, and the N limiting posts (150) are arranged at intervals along the circumference of the threaded rod (140); The outer peripheral wall of the ring body (330) of the first limiting slip ring (310) is provided with N / 2 grooves (350) and N / 2 avoidance grooves (360); the outer peripheral wall of the ring body (330) of the second limiting slip ring (320) is provided with N / 2 grooves (350) and N / 2 avoidance grooves (360); each of the grooves (350) is slidably connected to one of the limiting columns (150); each of the grooves (350) of the first limiting slip ring (310) is arranged opposite to one of the avoidance grooves (360) of the second limiting slip ring (320); the avoidance grooves (360) are used to avoid the limiting columns (150); In the ring body (330), the positive pressure oil chamber (332) and the negative pressure oil chamber (334) are both in communication with the groove (350); Wherein, N≥2×n, and n is a positive integer.

3. The automobile electric tailgate support rod (10) according to claim 1, characterized in that: The first driving member (120) comprises a first motor (122) and a planetary reducer (124); the first motor (122) is connected to the threaded rod (140) via the planetary reducer (124); A bevel gear (374) is provided at one end of the limiting sleeve (370) that faces away from the first driving member (120), and the second driving member (130) comprises a second motor, and an output end of the second motor is meshed with the bevel gear (374).

4. The automobile electric tailgate support rod (10) according to any one of claims 1 to 3, characterized in that: When the first limiting slip ring (310) cooperates with the threaded rod (140), oil can be applied to a portion of the limiting columns (150) among the plurality of limiting columns (150) through the positive pressure oil chamber (332) of the first limiting slip ring (310); When the second limiting slip ring (320) cooperates with the threaded rod (140), oil can be applied to a portion of the limiting columns (150) among the plurality of limiting columns (150) through the positive pressure oil chamber (332) of the second limiting slip ring (320); The plurality of limiting columns (150) are arranged at equal intervals along the circumference of the threaded rod (140).

5. The automobile electric tailgate support rod (10) according to any one of claims 1 to 3, characterized in that: The number of the first limiting slip ring (310) is at least one, and the number of the second limiting slip ring (320) is at least one; When the number of the first limiting slip ring (310) and the number of the second limiting slip ring (320) are both plural, the plural first limiting slip rings (310) are located on the same side of the plural second limiting slip rings (320), or at least one second limiting slip ring (320) is arranged between any two adjacent first limiting slip rings (310).

6. The automobile electric tailgate support rod (10) according to any one of claims 1 to 3, characterized in that: The first limiting sliding ring (310) and the second limiting sliding ring (320) are both further provided with a first one-way valve (380) and a second one-way valve (390); the first one-way valve (380) is in communication with the positive-pressure oil chamber (332), and the second one-way valve (390) is in communication with the negative-pressure oil chamber (334); the first telescopic rod assembly (100) further comprises: A lubricating oil assembly (160) is connected to the threaded rod (140); the lubricating oil assembly (160) is located between the limit assembly (300) and the first driving member (120); an oil outlet pipe of the lubricating oil assembly (160) is detachably connected to the first one-way valve (380); and an oil suction pipe of the lubricating oil assembly (160) is detachably connected to the second one-way valve (390).

7. The automobile electric tailgate support rod (10) according to any one of claims 1 to 3, characterized in that: Air bags (400) are provided in both the positive-pressure oil chamber (332) and the negative-pressure oil chamber (334).

8. The automobile electric tailgate support rod (10) according to any one of claims 1 to 3, characterized in that: The second telescopic rod set (200) comprises: A second telescopic rod (210); A push rod (220), wherein the second telescopic rod (210) is arranged around the push rod (220), the push rod (220) is provided with a matching groove (222), and the second end of the threaded rod (140) is connected to the matching groove (222); The first telescopic rod group (100) further comprises a limiting rod (170), wherein the limiting rod (170) is connected to the first telescopic rod (110), the limiting rod (170) is arranged around the threaded rod (140), and the limiting column (150) is arranged on the inner surface of the limiting rod (170); when the first telescopic rod (110) is located at the retracted position, the push rod (220) is located between the threaded rod (140) and the limiting rod (170), the return spring (500) is located between the limiting rod (170) and the second telescopic rod (210), and the return spring (500) is in contact with the first telescopic rod group (100).

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