Supporting rod assembly, tail door assembly and automobile

Abstract

The invention relates to the technical field of automobile accessories, in particular to a supporting rod assembly, a tail door assembly and an automobile, and the supporting rod assembly is simple in structure, low in cost and capable of hovering at any position. The supporting rod assembly comprises a sleeve and a supporting rod, wherein one axial end is provided with an opening; the telescopic piece comprises a cylinder barrel and a piston rod, at least partial structures of the cylinder barrel and the piston rod penetrate through the sleeve through the opening, and the piston rod is connected with the sleeve; the elastic piece is arranged on at least part of the structure, penetrating through the sleeve, of the cylinder barrel and is slidably connected with the sleeve in the axial direction; concave parts and convex parts which are matched with each other are arranged between the matching surfaces of the elastic piece and the sleeve, and one of the concave parts and the convex parts is arranged on the inner wall of the sleeve and sequentially arranged in the axial direction; the other one is arranged on the outer wall of the elastic piece; the elastic piece has a locking state for limiting the sleeve to slide in the axial direction. In the locking state, at least part of the structure of the convex part is embedded in the concave part; when the piston rod extends or retracts, the piston rod is suitable for driving the sleeve to slide in the axial direction and releasing the locking state of the elastic piece.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, and in particular to a support rod assembly, a tailgate assembly and an automobile. Background Art

[0002] The opening and closing of the tailgate of a car requires the use of a strut assembly. In some technical solutions, a pneumatic strut is used, but the traditional pneumatic strut can only stay at the maximum open position and cannot stay in the middle position, resulting in a poor user experience. In other technical solutions, electric struts and pneumatic balancing struts are used, but electric struts and pneumatic balancing struts often have complex structures and high production costs. Summary of the invention

[0003] One of the purposes of the present invention is to provide a support rod assembly to solve the problem that the traditional support rod assembly has a complex structure and is difficult to achieve hovering at any position; the second purpose is to provide a tailgate assembly; the third purpose is to provide a car.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A support rod assembly comprises a sleeve, one axial end of the sleeve has an opening; a telescopic member comprises a cylinder and a piston rod; at least part of the structure of the cylinder is passed through the opening in the sleeve; one end of the piston rod is slidably connected to the cylinder, and the other end of the piston rod is passed through the opening in the sleeve and connected to the sleeve; an elastic member is arranged on at least part of the structure of the cylinder passing through the sleeve, and is slidably connected to the sleeve along the axial direction; wherein matching recesses and protrusions are provided between the mating surfaces of the elastic member and the sleeve; one of the recesses and protrusions is arranged on the inner wall of the sleeve, and a plurality of them are arranged in sequence along the axial direction; the other is arranged on the outer wall of the elastic member; the elastic member has a locking state for limiting the axial sliding of the sleeve; in the locking state, at least part of the structure of the protrusion is embedded in the recess; when the piston rod is extended or shortened, it is suitable for driving the sleeve to slide axially and releasing the locking state of the elastic member.

[0006] By utilizing the above technical means, by setting a recess and a protrusion between the mating surfaces of the elastic member and the sleeve, when the elastic member is in a locked state, at least part of the structure of the protrusion is embedded in the recess, thereby providing friction resistance for the relative movement of the elastic member and the sleeve to prevent the sleeve from sliding axially. In actual application, when an external force is applied to extend or shorten the piston rod of the telescopic member, the piston rod drives the sleeve connected thereto to move axially, and the elastic member is squeezed and deformed to release the locked state, thereby extending or shortening the strut assembly; when the piston rod stops extending or shortening, the elastic member rebounds, and the recess and the protrusion between the elastic member and the sleeve cooperate to provide limiting friction resistance, so that the strut assembly can be suspended at any position. The technical solution of the present invention realizes self-locking through the recess and the protrusion between the elastic member and the sleeve, replaces complex mechanical structures, reduces the number of parts, simplifies the structure, reduces costs, and can achieve the suspension of the strut assembly at any position, improving the user experience.

[0007] Furthermore, the elastic member includes a fixed portion and a deformable portion, which are sleeved on one axial end of the cylinder; the deformable portion is located between the inner wall of the fixed portion and the outer wall of the cylinder; and the outer wall of the fixed portion is provided with at least one convex portion.

[0008] By using the above technical means, the deformable part is located between the inner wall and the outer wall of the cylinder. When the sleeve slides, the convex part and the concave part on the outer wall of the fixed part interact with each other, and the fixed part is pressed by force to squeeze the deformable part, so that the deformable part produces radial contraction, thereby releasing the locking state of the elastic part. This solution improves the reliability of radial deformation of the elastic part by setting the deformable part, thereby improving the smoothness of the telescopic assembly when extending and retracting, avoiding jamming, and further improving the user experience.

[0009] Furthermore, a first annular groove is provided on the outer wall of the cylinder, and an annular protrusion is provided on the inner wall of the fixing portion, and the annular protrusion is engaged with the first annular groove.

[0010] By using the above technical means, the fixing part is fixed to the first annular groove of the cylinder barrel through the annular protrusion, thereby ensuring the stability of the axial relative position between the fixing part and the cylinder barrel. In addition, the annular protrusion and the first annular groove are both set in annular shapes, which can evenly share the force on the fixing part, avoid problems such as stress concentration, and increase the service life of the elastic part.

[0011] Furthermore, an annular accommodating groove is provided on the outer wall of the cylinder and / or the inner wall of the fixing portion, and the deformable portion is arranged in the annular accommodating groove.

[0012] By utilizing the above technical means, the deformable portion is disposed in the annular accommodating groove, thereby limiting the axial position of the deformable portion, avoiding displacement of the deformable portion, and ensuring the reliability of radial deformation of the elastic member.

[0013] Furthermore, the elastic member also includes a sealing portion, which is annular and connected to an end of the fixing portion away from the cylinder barrel; the sealing portion is sleeved on the piston rod and tightly matched with the piston rod.

[0014] By utilizing the above technical means, a sealing part is provided so that the sealing part and the piston rod are closely matched, thereby enhancing the sealing of the telescopic part, preventing foreign matter from entering the cylinder, and ensuring the reliability of the application of the support rod assembly.

[0015] Furthermore, the fixing portion is further provided with at least one ventilation channel, and the ventilation channel penetrates through the at least one convex portion along the axial direction.

[0016] By utilizing the above technical means, a ventilation channel is provided to facilitate exhaust when the telescopic member is extended or shortened, thereby balancing the air pressure inside and outside the sleeve, ensuring smooth extension and retraction of the strut assembly and avoiding jamming.

[0017] Furthermore, the sleeve includes a barrel portion and a connecting portion, wherein an opening is formed at one axial end of the barrel portion and the other end is connected to the connecting portion; a plurality of recesses are provided on the inner wall of the barrel portion and the connecting portion is connected to the piston rod.

[0018] By utilizing the above-mentioned technical means, a plurality of recesses are provided on the inner wall of the cylinder portion, and the piston rod is connected to the connecting portion at one end of the inner wall of the cylinder portion, thereby ensuring the telescopic stroke of the strut assembly; in addition, recesses are provided on the inner wall of the cylinder portion, and convex portions are provided on the outer wall of the elastic member. The recesses on the cylinder portion can provide a clearer guide path, reduce the possibility of deviation or shaking, and thereby ensure the smoothness of the sliding of the sleeve.

[0019] Further, the recess is an annular recess, and a plurality of recesses are sequentially spaced apart along the axial direction of the sleeve; or, the recess is a spiral recess, and a plurality of recesses are sequentially connected end to end along the axial direction of the sleeve.

[0020] By utilizing the above technical means, a plurality of annular grooves or a plurality of spiral grooves are provided to increase the friction resistance between the sleeve and the elastic member, thereby ensuring the locking effect of the elastic member in the locked state.

[0021] Furthermore, the connecting portion is provided with a through hole, and at least a part of the structure of the piston rod extends out of the sleeve through the through hole; and along the circumference of the through hole, the piston rod is connected to the connecting portion.

[0022] By utilizing the above technical means, the piston rod is connected to the connecting portion along the circumferential direction of the perforation, which is beneficial to improving the sealing performance of the sleeve, preventing foreign matter from entering the sleeve, and increasing the service life of the telescopic member.

[0023] Furthermore, the telescopic member includes a first hinged portion, which is fixedly connected to at least a portion of the structure of the piston rod extending out of the sleeve and abuts against an end surface of the connecting portion.

[0024] By utilizing the above-mentioned technical means, the end face of the first hinged part abuts against the end face of the connecting part, so that the piston rod is completely covered by the first hinged part, the sleeve and the cylinder, and is not exposed to the outside; during the extension or shortening of the piston rod, there is no external foreign matter, water vapor, etc. to contaminate the piston rod, thereby further improving the service life of the telescopic part, and thereby improving the service life of the support rod assembly.

[0025] Furthermore, the telescopic member includes a limit ring, which is connected to the inside of the cylinder and sleeved on the outside of the piston rod. The limit ring is used to limit the movement stroke of the piston rod; a concave-convex structure is provided at the connection between the limit ring and the cylinder.

[0026] By using the above technical means, a concave-convex structure is set at the connection between the limit ring and the cylinder, which limits the axial and radial position of the limit ring in the cylinder, avoids displacement of the limit ring, and improves the integrity and reliability of the telescopic part.

[0027] A tailgate assembly, applied to an automobile, comprises the above-mentioned support rod assembly.

[0028] By using the above technical means, the support rod assembly is installed between the tailgate and the car body, with one end of the support rod assembly hinged to the car body and the other end hinged to the tailgate. When the tailgate is opened, the support rod assembly extends to provide an upward support force for the tailgate, so that the tailgate can be stably kept in an open state; when the tailgate is closed, the support rod assembly shortens and does not hinder the closing action of the tailgate. In addition, through the locking and unlocking functions of the support rod assembly, the tailgate can be stopped at different opening angles according to actual needs.

[0029] An automobile comprises the above-mentioned support rod assembly; or comprises the above-mentioned tailgate assembly.

[0030] By using the above technical means, the car is equipped with the above strut assembly, or a tailgate assembly including the above strut assembly, so as to improve the convenience and stability of the tailgate operation. When using the car tailgate, the user can open and close the tailgate more easily, and the tailgate is more stable in the open state, reducing the safety hazards caused by the shaking of the tailgate and other problems, and improving the overall quality of the car and the user experience.

[0031] Beneficial effects of the present invention:

[0032] (1) The support rod assembly of the present invention is provided with an elastic member, and a recessed portion and a convex portion that can be engaged with each other are provided between the mating surfaces of the elastic member and the sleeve, and the deformation of the elastic member is used to realize the switching between the locked and unlocked states, so that the support rod assembly can be suspended at any position, thereby improving the user experience;

[0033] (2) The support rod assembly of the present invention utilizes a self-locking mechanism of the cooperation between the concave part and the convex part to replace a complex mechanical structure, thereby reducing the number of parts, simplifying the structure, and reducing costs;

[0034] (3) The elastic member of the present invention improves the smoothness of telescopic assembly telescopic movement by providing a fixed portion and a deformable portion; the sealing performance of the telescopic member is improved by providing a sealing portion, thereby ensuring the reliability of the support rod assembly;

[0035] (4) The piston rod of the present invention is completely covered by the first hinge part, the sleeve and the cylinder, and is not exposed to the outside; during the extension or contraction of the piston rod, there is no external foreign matter, water vapor, etc. to contaminate the piston rod, which further improves the service life of the telescopic part and thus improves the service life of the support rod assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a cross-sectional view of a brace assembly according to an embodiment of the present invention;

[0037] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0038] Figure 3 for Figure 1 Sectional view along the BB direction;

[0039] Figure 4 is a cross-sectional view of a sleeve according to an embodiment of the present invention;

[0040] Figure 5 for Figure 4 A partial enlarged view of point C in the middle;

[0041] Figure 6 This is a schematic structural diagram of an elastic member according to an embodiment of the present invention;

[0042] Figure 7 is a cross-sectional view of an elastic member according to an embodiment of the present invention;

[0043] Figure 8 is a cross-sectional view of a telescopic member according to an embodiment of the present invention;

[0044] Fig. 9 for Figure 8 A partial enlarged view of point D in the middle;

[0045] Fig.10 It is a partial perspective view of a telescopic member according to an embodiment of the present invention.

[0046] Among them, the labels are:

[0047] 1-sleeve; 10-opening; 11-connecting portion; 111-through hole; 112-first end surface; 12-body portion; 121-recess; 1211-bottom wall; 1212, first side wall; 1213, second side wall;

[0048] 2-elastic member; 21-sealing portion; 22-fixing portion; 221-convex portion; 222-ventilation channel; 223-annular protrusion; 23-deformable portion;

[0049] 3-telescopic member; 31-first hinged part; 311-second end face; 32-piston rod; 321-second annular groove; 33-cylinder barrel; 331-annular accommodating groove, 332-first annular groove; 333-pit portion; 34-second hinged part; 35-circlip; 36-piston, 37-limiting ring; 371-limiting groove; 38-gas sealing part; 39-guide block. DETAILED DESCRIPTION

[0050] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0051] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0052] The opening and closing of the tailgate of a car needs to be achieved by using a strut assembly. In some technical solutions, a gas pressure strut is used to achieve the opening and closing of the tailgate. However, the gas pressure strut tailgate of a traditional ordinary tailgate can only stay in its maximum opening position and cannot stay in the middle position.

[0053] In other technical solutions, an electric tailgate opening and closing system is used to open and close the tailgate. The electric tailgate opening and closing system can be divided into two configuration schemes: the first is to install two electric struts on the left and right sides of the tailgate. The electric strut is a product that uses a motor to drive a lead screw actuator to extend and compress. Its structure is relatively complex and the cost is relatively high. The second is to install an electric strut and a pneumatic balance strut with a mechanical flocking spring on the left and right sides of the tailgate. The pneumatic balance strut has the appearance of an electric strut, and is equipped with a traditional gas spring and a mechanical flocking spring. The pneumatic balance rod needs to use a mechanical spring to support the inner and outer sleeves through the elasticity of the mechanical spring. The number of spring coils required to ensure the balance of the tailgate torque is large, so its structure is relatively complex and the cost is relatively high.

[0054] Based on this, the present invention provides a support rod assembly with a simple structure, low cost, and the ability to achieve hovering at any position, as well as a tailgate assembly and a car using the support rod assembly.

[0055] On the one hand, this embodiment provides a support rod assembly, such as Figure 1-Figure 3 As shown, the strut assembly includes a sleeve 1, a telescopic member 3 and an elastic member 2. The sleeve 1 is slidably connected to the rod end of the telescopic member 3, so that when the telescopic member 3 is extended or shortened, the sleeve 1 is driven to slide along the axial direction, thereby realizing the extension and shortening of the strut assembly; the elastic member 2 is arranged in the sleeve 1 and located between the sleeve 1 and the telescopic member 3.

[0056] Specifically, an opening 10 is provided at one axial end of the sleeve 1. The telescopic member 3 includes a cylinder 33 and a piston rod 32, and at least a portion of the structure of the cylinder 33 is inserted into the sleeve 1 through the opening 10. One end of the piston rod 32 is slidably connected to the cylinder 33, and the other end is inserted into the sleeve 1 through the opening 10 and connected to the sleeve 1. It can be understood that the end of the piston rod 32 extending out of the cylinder 33 is the rod end of the telescopic member 3. At the rod end of the telescopic member 3, at least a portion of the structure of the cylinder 33 is inserted into the sleeve 1, and can slide relative to the sleeve 1 in the axial direction, and the end of the piston rod 32 away from the cylinder 33 is fixedly connected to the sleeve 1 to drive the sleeve 1 to slide in the axial direction.

[0057] Furthermore, the elastic member 2 is arranged on at least a portion of the structure of the cylinder 33 that passes through the sleeve 1, and is slidably connected to the sleeve 1 along the axial direction. Among them, a matching recess 121 and a protrusion 221 are provided between the mating surfaces of the elastic member 2 and the sleeve 1. One of the recess 121 and the protrusion 221 is provided on the inner wall of the sleeve 1, and a plurality of them are sequentially provided along the axial direction; the other is provided on the outer wall of the elastic member 2. The elastic member 2 has a locking state that limits the axial sliding of the sleeve 1; in the locking state, at least a portion of the structure of the protrusion 221 is embedded in the recess 121 to provide friction resistance to relative movement. When the piston rod 32 is extended or shortened, it is suitable for driving the sleeve 1 to slide along the axial direction and releasing the locking state of the elastic member 2.

[0058] It can be understood that the elastic member 2 and the cylinder 33 are fixedly connected. When the elastic member 2 is in a locked state that limits the axial sliding of the sleeve 1, the elastic member 2 and the sleeve 1 cannot slide relative to each other, that is, the relative movement between the cylinder 33 and the sleeve 1 is limited, so that the strut assembly cannot be further extended or shortened.

[0059] Among them, the axial direction of the sleeve 1 is Figure 1 Preferably, the sleeve 1, the cylinder 33, the piston rod 32 and the elastic member 2 are coaxially arranged. Of course, in some cases, due to the influence of processing errors, the axes of the sleeve 1, the cylinder 33, the piston rod 32 and the elastic member 2 may also have a certain degree of deviation.

[0060] In this embodiment, by setting a recess 121 and a protrusion 221 between the mating surfaces of the elastic member 2 and the sleeve 1, when the elastic member 2 is in a locked state, at least part of the structure of the protrusion 221 is embedded in the recess 121, thereby providing friction resistance for the relative movement of the elastic member 2 and the sleeve 1, so as to prevent the sleeve 1 from sliding axially. In actual application, when an external force is applied to extend or shorten the piston rod 32 of the telescopic member 3, the piston rod 32 drives the sleeve 1 connected thereto to move axially, and the elastic member 2 is squeezed and deformed to release the locked state, thereby extending or shortening the strut assembly; when the piston rod 32 stops extending or shortening, the elastic member 2 rebounds, and the recess 121 and the protrusion 221 between the elastic member 2 and the sleeve 1 cooperate to provide limited friction resistance, so that the strut assembly can be suspended at any position.

[0061] The technical solution of the present invention realizes self-locking through the recessed portion 121 and the convex portion 221 between the elastic member 2 and the sleeve 1, thereby replacing a complex mechanical structure, reducing the number of parts, simplifying the structure, reducing the cost, and enabling the strut assembly to hover at any position, thereby improving the user experience.

[0062] In some embodiments, Figure 2 As shown, the inner wall of the sleeve 1 is provided with a plurality of the above-mentioned recesses 121, and the plurality of recesses 121 are sequentially arranged along the axial direction of the sleeve 1. Exemplarily, the sleeve 1 includes a sliding section that slides relative to the cylinder 33, and the above-mentioned recesses 121 are sequentially arranged along the axial direction on the sliding section to achieve hovering at any position within the telescopic stroke of the strut assembly. It can be understood that the length of the sliding section and the number of recesses 121 are specifically determined by the telescopic stroke of the strut assembly.

[0063] Furthermore, at least one convex portion 221 is provided on the outer wall of the elastic member 2 , and the shape and structure of the convex portion 221 match the concave portion 121 , so as to cooperate with the convex portion 221 to provide friction resistance for the relative movement between the sleeve 1 and the elastic member 2 .

[0064] In this embodiment, a recess 121 is provided on the inner wall of the sleeve 1 of the rigid structure, and a protrusion 221 is provided on the outer wall of the elastic part 2 of the elastic structure. The recess 121 of the rigid structure is not easily deformed, and a clearer guide path can be provided, thereby reducing the possibility of deviation or shaking when the sleeve 1 and the elastic part 2 slide relative to each other, thereby ensuring the smoothness of the sliding of the sleeve 1.

[0065] Furthermore, the concave portion 121 and the convex portion 221 extend along the circumference of the inner wall of the sleeve 1 and the circumference of the outer wall of the elastic member 2. The concave portion 121 and the convex portion 221 may be arranged in a ring shape or a spiral shape along the axial direction.

[0066] Exemplarily, the recess 121 may be an annular groove, and a plurality of recesses 121 are sequentially spaced along the axial direction of the sleeve 1. The spacing distance between adjacent annular grooves may be adaptively adjusted according to the requirements of the hovering position. Accordingly, the protrusion 221 may also be configured as an annular rib, and the annular rib may be provided with one, two, three, four or other number. When the annular rib is provided with more than two, the spacing between two adjacent annular ribs is equal to the spacing between two adjacent annular grooves.

[0067] Exemplarily, the recess 121 can also be a spiral groove, and a plurality of recesses 121 are connected end to end in sequence along the axial direction of the sleeve 1 to form a groove structure extending continuously in the axial direction. Correspondingly, the protrusion 221 can also be set as a spiral convex rib, and the spiral convex rib is provided with one, two, three, four or other numbers. Among them, when there are more than two spiral convex ribs, the adjacent spiral convex ribs are connected end to end in sequence to form a continuous convex rib structure. By setting the recess 121 and the protrusion 221 to a spiral shape, it is convenient to achieve stepless adjustment and reduce the sense of jamming during telescoping.

[0068] In the above embodiment, an annular groove or a spiral groove extending in the circumferential direction is provided to increase the contact area between the protrusion 221 and the recess 121, thereby increasing the friction resistance between the sleeve 1 and the elastic member 2, thereby ensuring the locking effect of the elastic member 2 in the locked state.

[0069] Furthermore, in some embodiments, a lubricating medium may be provided between the concave portion 121 and the convex portion 221 of the sleeve 1 and the elastic member 2, and the lubricating medium may be grease, etc. By injecting the lubricating medium between the concave portion 121 and the convex portion 221, the friction sound when the strut assembly is extended or shortened can be reduced, further improving the user experience.

[0070] In some embodiments, the recessed portion 121 is disposed on the inner wall of the sleeve 1 , and the protruding portion 221 is disposed on the outer wall of the elastic member 2 .

[0071] Specifically, Figure 6 and Figure 7 As shown, the elastic member 2 includes a fixed portion 22 and a deformable portion 23, and the fixed portion 22 and the deformable portion 23 are sleeved on one axial end of the cylinder 33. The deformable portion 23 is located between the inner wall of the fixed portion 22 and the outer wall of the cylinder 33, and the outer wall of the fixed portion 22 is provided with at least one of the above-mentioned protrusions 221. Among them, the deformable portion 23 can be fixedly connected to the inner wall of the fixed portion 22 to ensure the integrity of the elastic member 2.

[0072] In this embodiment, the deformable portion 23 is located between the inner wall and the outer wall of the cylinder 33. When the sleeve 1 slides, the convex portion 221 on the outer wall of the fixed portion 22 interacts with the concave portion 121, and the fixed portion 22 is pressed against the deformable portion 23, so that the deformable portion 23 contracts radially, thereby releasing the locked state of the elastic member 2. In this embodiment, the reliability of the radial deformation of the elastic member 2 is improved by providing the deformable portion 23, thereby improving the smoothness of the telescopic assembly when it is extended and retracted, avoiding jamming, and further improving the user experience.

[0073] The fixing portion 22 may be configured in a ring shape or a cylindrical shape, and the deformable portion 23 may be configured in a ring shape to facilitate assembly.

[0074] Furthermore, along the axial direction of the elastic member 2, specifically along the axial direction of the fixing portion 22, at least one convex portion 221 may be provided, that is, the convex portion 221 may be provided with one, two, three, four or other number. Figure 6 As shown, four protrusions 221 can be provided, which can provide appropriate friction resistance without occupying too much space, thereby ensuring the telescopic stroke of the support rod assembly.

[0075] The fixing portion 22 may be made of hard rubber, such as polyurethane rubber, nitrile rubber, chloroprene rubber, etc., and the deformable portion 23 may be made of soft rubber, such as natural rubber, silicone rubber, etc.

[0076] In some embodiments, Fig. 9 and Fig.10 As shown, the outer wall of the cylinder 33 is provided with a first annular groove 332. Figure 7 As shown, the inner wall of the fixing portion 22 is provided with an annular protrusion 223, and the annular protrusion 223 is engaged with the first annular groove 332 to limit the relative movement of the fixing portion 22 and the cylinder 33 in the axial direction. In this embodiment, the fixing portion 22 is fixed to the first annular groove 332 of the cylinder 33 by the annular protrusion 223, which ensures the stability of the axial relative position between the fixing portion 22 and the cylinder 33. In addition, the annular protrusion 223 and the first annular groove 332 are both set in annular shape, which can evenly share the force on the fixing portion 22, avoid the generation of stress concentration and other problems, and improve the service life of the elastic member 2.

[0077] Further, in some embodiments, the outer wall of the cylinder 33 and / or the inner wall of the fixing portion 22 is provided with an annular receiving groove 331, and the deformable portion 23 is disposed in the annular receiving groove 331. In this embodiment, the deformable portion 23 is disposed in the annular receiving groove 331 to limit the axial position of the deformable portion 23, thereby preventing the deformable portion 23 from shifting and ensuring the reliability of the radial deformation of the elastic member 2.

[0078] Specifically, Figure 8 and Fig. 9As shown, the outer wall of the cylinder 33 and the inner wall of the fixed part 22 are both provided with the annular receiving groove 331, and the deformable part 23 is arranged in the annular receiving groove 331 of both, and the annular receiving groove 331 can provide sufficient accommodation space for the deformable part 23. Of course, in some embodiments not shown in the figures, the annular receiving groove 331 can also be provided for one of the outer wall of the cylinder 33 and the inner wall of the fixed part 22. Preferably, the annular receiving groove 331 is provided on at least the outer wall of the cylinder 33 to accurately define the axial position of the deformable part 23.

[0079] Further, in some embodiments, the elastic member 2 further includes a sealing portion 21, which is annular and connected to one end of the fixing portion 22 away from the cylinder 33. The sealing portion 21 is sleeved on the piston rod 32 and closely matches the piston rod 32. In this embodiment, the sealing portion 21 closely matches the piston rod 32, which enhances the sealing of the telescopic member 3, prevents foreign matter from entering the cylinder 33, and ensures the reliability of the application of the support rod assembly.

[0080] Specifically, the sealing part 21 can be made of hard rubber, such as polyurethane rubber, nitrile rubber, chloroprene rubber, etc., and the inner diameter of the sealing part 21 can be set to be smaller than the outer diameter of the piston rod 32 to achieve a close fit between the two.

[0081] Exemplarily, the fixing portion 22 and the sealing portion 21 may be made of the same material and integrally formed to facilitate processing and manufacturing.

[0082] Furthermore, in some embodiments, Figure 3 and Figure 6 As shown, the fixing portion 22 is further provided with at least one ventilation channel 222, and the ventilation channel 222 axially penetrates at least one convex portion 221. In this embodiment, the ventilation channel 222 is provided to facilitate exhaust when the telescopic member 3 is extended or shortened, thereby balancing the air pressure inside and outside the sleeve 1, ensuring the smoothness of the extension and contraction of the support rod assembly, and avoiding jamming.

[0083] It can be understood that in this embodiment, along the axial direction of the fixing portion 22, the ventilation channel 222 penetrates all the protrusions 221 on the fixing portion 22. That is, when a plurality of protrusions 221 are provided on the fixing portion 22, the ventilation channel 222 penetrates the plurality of protrusions 221 along the axial direction.

[0084] Exemplarily, the ventilation channel 222 may be a groove penetrating the convex portion 221 , or may be a through hole penetrating the convex portion 221 , as long as the function of balancing the air pressure can be achieved.

[0085] Exemplarily, the ventilation channel 222 may be provided with one, two, three or more. When the ventilation channel 222 is provided with two or more, the two or more ventilation channels 222 may be arranged at intervals along the circumference of the fixing portion 22, preferably at even intervals.

[0086] Furthermore, in some embodiments, Figure 4 and Figure 5 As shown, the sleeve 1 includes a barrel portion 12 and a connecting portion 11, wherein an opening 10 is formed at one axial end of the barrel portion 12, and the other end is connected to the connecting portion 11. The sliding section is formed on the inner wall of the barrel portion 12, that is, a plurality of recesses 121 are provided on the inner wall of the barrel portion 12. The connecting portion 11 is connected to the piston rod 32, specifically, the connecting portion 11 is fixedly connected to the end of the piston rod 32 away from the cylinder barrel 33, such as threaded connection, welding, clamping, riveting, etc.

[0087] It can be understood that in this embodiment, the connecting portion 11 is located at one axial end of the cylinder portion 12, specifically at one end of the cylinder portion 12 away from the telescopic member 3, and the piston rod 32 is connected to the connecting portion 11 to ensure the telescopic stroke of the strut assembly. Exemplarily, the cylinder portion 12 and the connecting portion 11 can be integrally formed, and the above-mentioned recess 121 is machined on the inner wall of the cylinder portion 12 by turning or the like, which has a simple structure, is easy to process and manufacture, and has a low production cost.

[0088] For example, Figure 5 As shown, the recess 121 may include a bottom wall 1211 and a first side wall 1212 and a second side wall 1213 connected to both sides of the bottom wall 1211 along the axial direction of the barrel 12, wherein the first side wall 1212 and the second side wall 1213 may be configured as inclined surfaces to facilitate guiding the convex portion 221 on the elastic member 2 to be embedded in or out of the recess 121. The first side wall 1212 forms a first angle with the inner wall of the barrel 12, that is, Figure 5 In α, the second side wall 1213 and the inner wall of the barrel 12 form a second angle, that is, Figure 5 For example, the first angle may be any value between 90° and 180°; the second angle may also be any value between 90° and 180°.

[0089] It can be understood that the larger the angle of the first angle and the second angle, the gentler the inclined surface of the first side wall 1212 and the second side wall 1213, the smaller the friction resistance provided, and the smaller the supporting force or limiting force generated; conversely, the smaller the angle of the first angle and the second angle, the steeper the inclined surface of the first side wall 1212 and the second side wall 1213, the greater the friction resistance provided, and the greater the supporting force or limiting force generated. The present invention does not specifically limit the angles of the first angle and the second angle, and the specific values ​​of the two can be adaptively adjusted according to the supporting force or limiting force required by the supported structure.

[0090] Furthermore, the connection between the first side wall 1212 and the inner wall of the barrel portion 12, and the connection between the second side wall 1213 and the inner wall of the barrel portion 12 can be provided with an arc-shaped transition portion, such as a chamfer, to further improve the sliding smoothness of the sleeve 1 and avoid jamming.

[0091] Further, in some embodiments, a perforation 111 may be provided on the connecting portion 11. It can be understood that the perforation 111 penetrates the connecting portion 11 along the axial direction of the sleeve 1, and the perforation 111 and the piston rod 32 are preferably coaxially arranged. At least part of the structure of the piston rod 32 extends out of the sleeve 1 through the perforation 111 to facilitate the installation of other connecting structures. And along the circumference of the perforation 111, the piston rod 32 is connected to the connecting portion 11. In this way, the piston rod 32 is connected to the connecting portion 11 along the circumference of the perforation 111, which is conducive to improving the sealing of the sleeve 1, preventing foreign matter from entering the sleeve 1, and improving the service life of the telescopic member 3.

[0092] For example, along the circumference of the through hole 111, the piston rod 32 can be engaged with the connecting portion 11. Fig. 9 As shown, a second annular groove 321 is provided at one end of the piston rod 32 away from the cylinder barrel 33. The second annular groove 321 is located at the through-hole 111. At least part of the structure of the connecting portion 11 is engaged in the second annular groove 321. Specifically, part of the structure of the connecting portion 11 extending around the through-hole 111 abuts against the inner groove wall of the second annular groove 321, thereby limiting the relative movement of the piston rod 32 and the sleeve 1 in the axial direction.

[0093] Alternatively, in some embodiments not shown, along the circumference of the through hole 111 , the piston rod 32 may also be welded, threaded, or interference fit with the connecting portion 11 .

[0094] Furthermore, the support rod assembly further includes a first hinge portion 31 and a second hinge portion 34, which are respectively connected to the axial ends of the support rod assembly to be respectively hinged to the supported components. For example, when the support rod assembly is applied to a tailgate assembly, the supported components are the vehicle body and the tailgate, and the first hinge portion 31 and the second hinge portion 34 are respectively used to be hinged to the vehicle body and the tailgate. Exemplarily, the first hinge portion 31 and the second hinge portion 34 can be a ball joint, a U-shaped joint, etc., preferably a ball joint.

[0095] In some embodiments, Figure 8-Figure 10 As shown, the telescopic member 3 includes the first hinged portion 31 and the second hinged portion 34. Among them, at least a part of the structure of the end of the piston rod 32 away from the cylinder 33 extends out of the sleeve 1 through the above-mentioned through hole 111. At this time, the first hinged portion 31 can be fixedly connected to at least a part of the structure of the piston rod 32 extending out of the sleeve 1, and the second hinged portion 34 can be fixedly connected to the end of the cylinder 33 away from the piston rod 32.

[0096] Furthermore, in this embodiment, the first hinged portion 31 is fixedly connected to at least a portion of the structure of the piston rod 32 extending outside the sleeve 1, and abuts against the end surface of the connecting portion 11. Specifically, the first hinged portion 31 and the piston rod 32 can be fixedly connected by welding, interference fit, threaded connection, etc. Figure 4 and Fig. 9 As shown, the connecting portion 11 has a first end face 112, and the first end face 112 is located on the side of the connecting portion 11 away from the barrel portion 12. The first hinged portion 31 has a second end face 311, and the second end face 311 is located on the side of the first hinged portion 31 close to the connecting portion 11, and the first end face 112 abuts against the second end face 311. In this embodiment, the end face of the first hinged portion 31 abuts against the end face of the connecting portion 11, and the connecting portion 11 is engaged with the second annular groove 321, so that the piston rod 32 is completely covered by the first hinged portion 31, the sleeve 1 and the cylinder 33, and is not exposed to the outside. During the extension or shortening process of the piston rod 32, no foreign matter, water vapor, etc. will contaminate the piston rod 32, which further improves the service life of the telescopic member 3, and thus improves the service life of the support rod assembly.

[0097] Further, an extension portion may be provided at one end of the cylinder 33 away from the piston rod 32, and the second hinge portion 34 may be fixedly connected to the cylinder 33 through the extension portion. The second hinge portion 34 and the extension portion may be fixedly connected by welding, interference fit, threaded connection, etc.

[0098] Alternatively, in some embodiments not shown in the figures, the piston rod 32 is disposed in the sleeve 1, and the first hinged portion 31 can be fixedly connected to an end of the sleeve 1 away from the telescopic member 3, that is, fixedly connected to the above-mentioned connecting portion 11.

[0099] Furthermore, if Figure 8 As shown, the telescopic member 3 may further include at least two clips 35 , and the at least two clips 35 are respectively disposed on the first hinge portion 31 and the second hinge portion 34 .

[0100] Furthermore, in some embodiments, Fig. 9 and Fig.10 As shown, the telescopic member 3 further includes a limit ring 37, which is connected to the inside of the cylinder 33 and sleeved on the outside of the piston rod 32. The limit ring 37 is used to limit the movement stroke of the piston rod 32. A concave-convex structure is provided at the connection between the limit ring 37 and the cylinder 33. In this embodiment, the concave-convex structure limits the axial and radial position of the limit ring 37 in the cylinder 33, avoids displacement of the limit ring 37, and improves the integrity and reliability of the telescopic member 3.

[0101] Exemplarily, the concave-convex structure includes a concave portion 333 arranged on the cylinder 33 and a limiting groove 371 arranged on the limiting ring 37. The concave portion 333 forms a protrusion on the inner wall of the cylinder 33, and the protrusion is embedded in the limiting groove 371 on the limiting ring 37, thereby playing a circumferential limiting role on the limiting ring 37.

[0102] Furthermore, the telescopic member 3 may further include a piston 36, an air seal portion 38 and a guide block 39, all of which are disposed in the cylinder 33. Figure 8 As shown, the piston rod 32 is slidably matched with the inner wall of the cylinder 33 through the piston 36. Specifically, the piston 36 is connected to the end of the piston rod 32 away from the sleeve 1 and is slidably connected to the inner wall of the cylinder 33. The piston 36 is located on the side of the limit ring 37 away from the sleeve 1. Fig. 9 As shown, the gas seal 38 and the guide block 39 are located on the side of the limit ring 37 close to the sleeve 1, and are connected to the inner wall of the cylinder 33. The gas seal 38 and the guide block 39 are both sleeved on the outside of the piston rod 32. The gas seal 38 is tightly matched with the outer wall of the piston rod 32 to ensure the sealing inside the cylinder 33; the guide block 39 is arranged at one end of the cylinder 33 close to the sleeve 1, and is used to guide the extension and retraction of the piston rod 32.

[0103] Furthermore, the telescopic member 3 of the present invention can be a gas pressure strut, a damping gas spring, or other driving member with telescopic function, which can be selected according to the adaptability of the application scenario. In the present invention, by adjusting the extension force or contraction force of the telescopic member 3 and the friction resistance between the sleeve 1 and the elastic member 2, the two cooperate with each other to match the force value characteristics of the strut assembly with different requirements, and the applicability is good.

[0104] In some embodiments not shown in the figures, a plurality of the above-mentioned convex portions 221 may be provided on the inner wall of the sleeve 1, and the plurality of convex portions 221 are sequentially arranged along the axial direction of the sleeve 1. At least one above-mentioned concave portion 121 may be provided on the outer wall of the elastic member 2. The specific structures of the sleeve 1, the elastic member 2 and the telescopic member 3 are similar to the above-mentioned embodiment types, and will not be described in detail here.

[0105] The support rod assembly of the present invention realizes suspension at any position by adding a sleeve 1 and an elastic member 2 on the basis of a traditional support rod structure, and has a simple structure and low cost. It can be understood that the support rod assembly of the present invention can be applied to the automotive field, such as the tailgate assembly of an automobile, and can also be applied to other scenes requiring support and positioning, such as furniture and medical treatment.

[0106] On the other hand, this embodiment provides a tailgate assembly for a car, the tailgate assembly comprising a car body, a tailgate and the above-mentioned support rod assembly. The support rod assembly is installed between the tailgate and the car body, one end of the support rod assembly is hinged to the car body, and the other end is hinged to the tailgate. Specifically, the two ends of the support rod assembly can be hinged to the tailgate and the car body through the above-mentioned first hinge part 31 and the second hinge part 34.

[0107] In actual application, when the tailgate is opened, the strut assembly extends to provide an upward supporting force for the tailgate, so that the tailgate can be stably kept in an open state; when the tailgate is closed, the strut assembly shortens so as not to hinder the closing action of the tailgate. Moreover, through the locking and unlocking functions of the strut assembly, the tailgate can be stopped at different opening angles according to actual needs. In addition, in the tailgate assembly of the present invention, the strut assembly is used to replace the traditional gas pressure strut or the balance strut of the electric tailgate, thereby achieving the purpose of reducing costs.

[0108] On the other hand, this embodiment provides an automobile, including the above-mentioned support rod assembly; or, including the above-mentioned tailgate assembly.

[0109] In this embodiment, the vehicle is equipped with the strut assembly or the tailgate assembly including the strut assembly, thereby improving the convenience and stability of the tailgate operation. When using the tailgate, the user can open and close the tailgate more easily, and the tailgate is more stable in the open state, reducing safety hazards caused by problems such as tailgate shaking, and improving the overall quality of the vehicle and user experience.

[0110] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A support rod assembly, characterized in that: include: A sleeve (1), wherein one axial end of the sleeve (1) has an opening (10); The telescopic member (3) comprises a cylinder (33) and a piston rod (32); at least a part of the structure of the cylinder (33) is inserted into the sleeve (1) through the opening (10); one end of the piston rod (32) is slidably connected to the cylinder (33), and the other end is inserted into the sleeve (1) through the opening (10) and connected to the sleeve (1); An elastic member (2) is arranged on at least a portion of the structure of the cylinder (33) that passes through the sleeve (1), and is slidably connected to the sleeve (1) along the axial direction; Wherein, a matching recess (121) and a convex portion (221) are provided between the matching surfaces of the elastic member (2) and the sleeve (1); one of the recess (121) and the convex portion (221) is provided on the inner wall of the sleeve (1), and a plurality of the recess (121) and the convex portion (221) are provided in sequence along the axial direction; the other is provided on the outer wall of the elastic member (2); The elastic member (2) has a locking state for limiting the axial sliding of the sleeve (1); in the locking state, at least a portion of the structure of the protrusion (221) is embedded in the recess (121); when the piston rod (32) is extended or shortened, it is suitable for driving the sleeve (1) to slide axially and releasing the locking state of the elastic member (2).

2. The support rod assembly according to claim 1, characterized in that: The elastic member (2) comprises a fixed portion (22) and a deformable portion (23), wherein the fixed portion (22) and the deformable portion (23) are sleeved on one axial end of the cylinder (33); the deformable portion (23) is located between the inner wall of the fixed portion (22) and the outer wall of the cylinder (33); and the outer wall of the fixed portion (22) is provided with at least one protrusion (221).

3. The support rod assembly according to claim 2, characterized in that: The outer wall of the cylinder (33) is provided with a first annular groove (332), and the inner wall of the fixing portion (22) is provided with an annular protrusion (223), and the annular protrusion (223) is engaged with the first annular groove (332).

4. The support rod assembly according to claim 2, characterized in that: An annular accommodating groove (331) is provided on the outer wall of the cylinder (33) and / or the inner wall of the fixing portion (22), and the deformable portion (23) is arranged in the annular accommodating groove (331).

5. The support rod assembly according to claim 2, characterized in that: The elastic member (2) further comprises a sealing portion (21), the sealing portion (21) being annular and connected to an end of the fixing portion (22) away from the cylinder (33); The sealing portion (21) is sleeved on the piston rod (32) and is tightly matched with the piston rod (32).

6. The support rod assembly according to claim 2, characterized in that: The fixing portion (22) is further provided with at least one ventilation channel (222), and the ventilation channel (222) penetrates the at least one convex portion (221) along the axial direction.

7. The brace assembly according to any one of claims 1 to 6, characterized in that: The sleeve (1) comprises a barrel portion (12) and a connecting portion (11); one axial end of the barrel portion (12) forms the opening (10), and the other end is connected to the connecting portion (11); the inner wall of the barrel portion (12) is provided with a plurality of recesses (121), and the connecting portion (11) is connected to the piston rod (32).

8. The support rod assembly according to claim 7, characterized in that: The recess (121) is an annular groove, and a plurality of the recesses (121) are sequentially spaced apart along the axial direction of the sleeve (1); or, the recess (121) is a spiral groove, and a plurality of the recesses (121) are sequentially connected end to end along the axial direction of the sleeve (1).

9. The support rod assembly according to claim 7, characterized in that: The connecting portion (11) is provided with a through hole (111), and at least a part of the structure of the piston rod (32) extends out of the sleeve (1) through the through hole (111); and along the circumference of the through hole (111), the piston rod (32) is connected to the connecting portion (11).

10. The support rod assembly according to claim 9, characterized in that: The telescopic member (3) comprises a first hinged portion (31), the first hinged portion (31) being fixedly connected to at least a portion of the structure of the piston rod (32) extending outside the sleeve (1), and abutting against an end surface of the connecting portion (11).

11. The brace assembly according to any one of claims 1 to 6, characterized in that: The telescopic member (3) comprises a limiting ring (37), the limiting ring (37) being connected to the inside of the cylinder (33) and sleeved on the outside of the piston rod (32), the limiting ring (37) being used to limit the movement stroke of the piston rod (32); A concave-convex structure is provided at the connection between the limiting ring (37) and the cylinder barrel (33).

12. A tailgate assembly, applied to a car, characterized in that: Comprising at least one strut assembly according to any one of claims 1-11.

13. A car, characterized in that: It comprises at least one support rod assembly as claimed in any one of claims 1 to 11; or, it comprises a tailgate assembly as claimed in claim 12.

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